Since you brought it up...
(and I know this is about Golfs, but as we're discussing paradym shifts and class history....an ITA history lesson---
Back in "the day"...say '91 or so, the RX-7 was enjoying much success in ITA. Some saw it as the "dominant" car. It was, if you defined "dominant" as "the car with the most wins". But...a well prepped and well driven Mazda RX-3Sp could always run with an equally well prepped and well driven RX-7. And BMW 2002tii's were right there as well, except few had the skills and patience to deal with the Kleiglefucher (I know, a little joke there, the real name escapes me) mechanical injection system.
Then came the CRX. On paper, it didn't look wrong...but then a certain driver (who weighed over 300 pounds), started beating track record holders. And other CRXen got built and did very well. In time, the PTB (at that time I don't think the ITAC existed) saw the issue. (We've been over this- sorry for those that know the ending) What to do? Can't lower the weight, although it's an obvious mistake...(born from the car being more than it's stock numbers suggested, or a simple misweight, or it being a classic overachiever in the engine dept, you choose) so, the only solution is to add other cars to keep the class from becoming a one horse show. Enter the 240SX, and the Integra, etc. And, the track records fell. Indeed, the class performance bar had been raised. No RX-7 or 2002tii or RX-3 could compete.
(Rough numbers: CRX: 2140 lbs, 127 or so at the wheels with tq in the 115 range..(help me if I'm remembering wrong), good susp. and brakes.
RX-7: 128- 130 or so at the wheels, 102 tq, live rear axle and ok brakes, but...2380 pounds. 240 pounds more, inferior handling and braking, (relative) and about a 15% deficit in tq. See the issue?
Enter the ITAC...it matures and shows it's worth, and in time, develops the "Process" and makes a major adjustment, know as the "Great Realignment"(TM) henceforth known as "GA"....which is Not theGreg Amy.
Among other things, the RX-7 went to 2280, and the CRX got 110 pounds added. So, the GA attempted to right the wrongs of the past, but there were constraints...the RX-7 for example was thought to be at the absolute minimum...or even an unachievable level with it's new weight. Is it enough?
Some say no....but it's better than it was, obviously.
So, to sum up, YES, the performance paradigm shifted higher when the CRX (and subsequent 'fixes') joined ITA, and it was lowered somewhat in the GA, but....not nearly to earlier levels.
As to the RX-7, it is my feeling that it is a car that isn't treated well by the process in ITA, as the process fails to account for it's dismal TQ, and there is no nod to the "antique" suspension, but as the car sits at a weight most can't get to, how could there be? What to do? (We've beaten that to death, so we won't go there..this isn't about the RX-7 per se' anyway)
(Now, this is my opinion...as an ITAC guy I say "The needs of the many outweigh the needs of the few" and my attention focuses on other issues. And as I have an RX-7, it's certainly not my place to champion it's causes in the ITAC.)