Those are good acceptance ratios.
I have only a select few sites I still upload to but I don't really track my acceptance ratio on a percentage basis.
On SS, I have the odd rejection here and there, but I upload in small batches.
On BsP they give your ratio (mine's about 98.217 or something weird like that - I've had only 1 rejection there)
On FP it's pretty much 100%
Crestock I don't really upload to any longer - acceptance ratio there is pretty low, so if you are getting at 65% acceptance there I'd say that's amazing.
For a while I was uploading to StockphotoKing (when they first started) but nothing is happening there, though I had a 100% ratio there too.
I stopped uploading a long time ago at Gimmestock
Same for Canstock (think I only uploaded about 10 there a couple of years ago, and took them down right quick)
Never joined the Galastock fiasco, not even when they invited me
Never applied to IS, DT, LO, 122RF, Fotolia or most of the others.