Do you have any numbers to back up your claim? Or do you only rely on "feelings"?
My PCT with S4 (ca. 20-50 mg/day), after a cycle with ANAVAR:
5th February 2010, immediately after the end of the cycle, when I was "tapering" the Anavar dose down to 10 mg/day:
Testosterone 11,3 ng/dl (almost 100% suppression)
Between 10th-14th February I was taking 10 mg Anavar+S4, and then only S4. I started at ca. 20 mg/day, and in mid-March, I was using ca. 35 mg/day. This dose proved to be barely anti-catabolic.
15th March 2010:
Testosterone 132,1 ng/dl
In late March, I went up to 45-50 mg/day, which finally brought very good results, especially as for strength endurance.
I stopped using S4 on 16th April 2010 and continued on 1 mg anastrozole/day.
5th May 2010:
Testosterone 424,6 ng/dl
I definitely finished with anastrozole on 29th May.
So, as you can see, doses of S4 in the range of 20-35 mg/day didn't interfere with the recovery of testosterone at all, especially when you take into consideration that the testosterone concentration was on the level of a castrated male and we could suppose that it would take several months to regenerate without ancillaries. But I must also add that S4 at such doses was barely effective. I believe that I could take around 40 mg/day without affecting my testosterone recovery in a significant way.