CCYoshi's Momentum-o-Meter: Istanbul
Looking Up:
Williams: A 1-3 finish from a team that suddenly can do no wrong (nearly), taking the lead by 5 points in the constructor's championship.
Machiels: A strong run to a podium reminiscent of Kawasie's run in Hockenheim. (bias? yes) Both were strong 2nd place runs from the pole in weaker cars; and both led the most laps too. Very impressive.
Haswell and Domingues: Contenders of the past and/or present back on stride with solid point finishes. (after, y'know, a period of lousy races

)
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On the Edge:
Edwards: Got a single point in an Aguri - but the home crowd almost seemed to expect more from their hero after a 5th place finish last race.
Chang: Renault is quickly becoming either the unluckiest or the least reliable team this season, despite their pace.
Allman: 3rd place, then retirement, then 4th, then 18th (+1 lap) at Istanbul. Consistency ftw.
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Falling Down:
Ferrari 056: Twice in a row has lost oil pressure and blown up rather spectacularly under Beyens - cutting his championship lead down to 9 points. Will this free fall continue?
Weiland: Took me 3 races to find out, but the championship's only female driver has another dubious distinction - to be the only person in Season 6 without a point so far. (I know she and Shepherd have had internet troubles, but a lot of other AWOL people have at least lucked into points)
Calculus Homework: Blamed by Kawasie for causing lack of time to write reports, and lack of race pace also (because, y'know, those textbooks are heavy). Also known as "dangit I can't find a third person to gripe about".