To answer everyone's questions:
1) This set didn't last us as long as our prior set because Milwaukee Mile is VERY hard on tires and these saw 3 days worth of Milwaukee Mile w/6 30 minute sessions a day, then 4 days at Waterford Hills (2 days but 2 people driving so double stinted) and then 1 day at Autobahn Full track and the final day was at Grattan when they corded like that.
2) I like the newer C51 compound for better stick BUT these are nice and longer lived on FWD if you don't use them at Milwaukee Mile so overall bang for the buck was very good! Compared to the 211s these had slightly better stick and slightly longer lasting overall.
3) Yeah it is indeed a hard compound to wear down because our previous set was overheatcycled BEFORE even getting to cords ..lol