A full week of practice is in the books – six full days with all cars, plus rookie orientation on May 10, with nary a rain interruption nor a major accident thus far. The speeds set this week largely reflect potential race pace, as the best laps have come via large tows, and it's been tougher to gauge the pace in solo runs. On Friday, the series will increase the boosts, so single-car runs will take precedence and the speeds – roughly 218 to 219mph in solo runs thus far – are likely to increase to at least the 223 to 224mph threshold. Here are some of the trends from the week's worth of running to this point.

NEWGARDEN'S WEEK TO SHINE – Whether it's down to a fresh paint job on his Sarah Fisher Hartman Racing thanks to Indy-only sponsor Dollar General, or just the fact the kid's a quick learner, Josef Newgarden has, by all accounts, upstaged the usual suspects as a permanent resident on the top of the leaderboard. Newgarden has ended the day fastest three times out of six, earning an extra $15,000 for his team ($5,000 apiece), and had three days where he ended over 222mph in the tow.

His week hasn't been without incident – the rookie had the month's first spin after losing it off Turn 4 on Wednesday, but sustaining only minimal damage to his car. He was back out on Thursday, no issues, and posted a 222.709 for the day. It will be interesting to see how his solo laps compare and whether he stays near the top of the charts.

The fact Newgarden's been so close to the top has overshadowed how well fellow rookie Bryan Clauson has acclimated to the Speedway in his first IndyCar start. Clauson has gained experience with consistent laps, shown strongly in the draft, and occasionally hit the 221mph lap mark as well.

IT'S STILL FAIRLY BUNCHED – Looking through the combined practice speeds, while the strongly tow-assisted best laps of the month from Marco Andretti and Scott Dixon each eclipsed 223mph, and three others ran in the 222 range, the next 23 drivers all have a best lap between 221 and 219mph – most are in the tow, but with not quite as big a tow as the best laps.

The top 10 combined speeds feature drivers from five different teams – there are five Hondas and five Chevrolets apiece in the bunch. Sixteen drivers have exceeded 221mph for their best lap of the month, with 21 of the 32 that have posted an official time (Katherine Legge's rookie orientation program not counted) over the 220mph barrier.

Still, there are a couple anomalies of that group. The Foyt cars, for instance, made a major jump on Thursday, because throughout the week, both Mike Conway and Wade Cunningham struggled to top 218 with any regularity. Cunningham had a gradual climb each day, from 216.657 Sunday to the team's best lap of 221.450 on Thursday, with roughly one mph gained each day. Conway's 2.7mph spike from Wednesday to Thursday (217.2 to 220.9) would indicate tow to help find the speed more likely than trimming out the car to its ultimate minimum level of downforce.

WHAT'S THE BIG DOGS' BITE? – Of the three “power teams” within the IZOD IndyCar Series, Andretti Autosport has consistently shown pace both in single-car runs and in the tow, while Chip Ganassi Racing has had more moments of speed than not, and Team Penske has largely laid in the weeds. Whether that changes for Fast Friday remains to be seen – if in fact the “big dogs” will shoot to the top and lock out the top eight or nine positions or whether the underdogs will continue to have their day.

Andretti's quintet of Marco Andretti, James Hinchcliffe, Ryan Hunter-Reay, Sebastian Saavedra and Ana Beatriz have shown a good comfort and handle on their cars, and all but Beatriz has ended a day in the top five on the speed charts. The team didn't run on Thursday, probably opting to save a day's worth of sets of tires. So far, the pace shown by the team has erased the memories of last year's qualifying disaster when Andretti barely qualified, Conway didn't, and Hunter-Reay was bumped out at the last minute and raced thanks only to a purchase of a starting spot from Foyt.

Ganassi's Scott Dixon, Graham Rahal and Charlie Kimball have all had some very strong tows throughout the week, and largely stayed in the top 10. Dario Franchitti has been just a small fraction off his teammates' pace, but still within the top eight each of the last four days. Rahal rebounded from the month's lone blown engine thus far to post a 221.855 the day after changing.

As for Penske, you wonder if their relative lack of pace has been simply preparing for the race or if there's more of a struggle in dialing in the setup. Similar to Andretti, Penske's trio of cars withheld running too much on Wednesday to save tires, and the first signs of life came Thursday when Will Power and Ryan Briscoe each turned their fastest laps over the 221mph threshold. Helio Castroneves' 222.025, second on Tuesday, has been the lone eye-popping number from the group this month.