Yes, they did.
The RA report came from a member on another forum. I don't know if he's on here or not but I do know others from that forum are here. If they care to, they can chime in. I'm not going to link to it because I wasn't there and I'm not trying to spread FUD. On the other hand, I have...
It was reported that an engine blew at the Road America track day. I believe there was a report of one blowing at LS as well.
I'm pretty sure it there was a reported issue with one of the MM cars at COTA as well. Not sure if it was mechanical or electrical though. In any case, the cars have...
Probably just depends on how much lighter they are. I would hope that the system can handle some change in weight. I think that Ford's response would probably be that it's designed to go fast as-is and that some of the traditional things that people do to track-prep their cars like aftermarket...
The answer to your question was the very next sentence:
EDIT: After re-reading your question, are you asking what would happen if you put the standard, heavier wheels on an R-model? I don't know, but a) it can't be good, and b) Why would anyone want to? :)
Nowhere did they say it was weak. They said it was great in fact. They just said it wasn't amazing. So what? Every single review has been more than positive.