I don't think EB1 would be retrogressed heavily as it had been current for about 9-10 months before the june-july fiasco. So there should not have been a huge amount of submissions of I-485 from EB1 applicants. It is currently slightly retrogressed as unused EB1 visa numbers are given to EB2. But again, these are all assumptions and nobody can predict what's going to happen. I guess, gotta wait another month for the Oct VB.
It does not matter if EB1 submissions are less or more. Overall all EB submissions are a lot. So everything will move very slow even if your dates are current.