6 weeks is just phase one of recovery. 
It sounds like your surgeon is fine, it's the unreasonable PTs that are the problem. I think they overemphasize exercises because they have the false idea that if they don't we will all sit around like lumps after surgery.
My first PT (I realize in retrospect) tried to rush me and I wound up dealing with tendonitis. My second PT recognized that I wasn't going to get much increase in bend until we managed the swelling. So exercises were fairly light to start and increased only as long as they didn't increase swelling. I did a few heel slides and other exercises (not many all on one day), a little walking (gradually increasing from 5 minutes to 10 and so on).
I got about the same ROM with the more aggressive PT (but lingering tendonitis) as I did with the more reasonable PT approach (with a knee that healed smoothly and with no lingering issues).
So much of tkr recovery is individual. It it important to listen to your body and think in terms of increments.
It sounds like your surgeon is fine, it's the unreasonable PTs that are the problem. I think they overemphasize exercises because they have the false idea that if they don't we will all sit around like lumps after surgery.
My first PT (I realize in retrospect) tried to rush me and I wound up dealing with tendonitis. My second PT recognized that I wasn't going to get much increase in bend until we managed the swelling. So exercises were fairly light to start and increased only as long as they didn't increase swelling. I did a few heel slides and other exercises (not many all on one day), a little walking (gradually increasing from 5 minutes to 10 and so on).
I got about the same ROM with the more aggressive PT (but lingering tendonitis) as I did with the more reasonable PT approach (with a knee that healed smoothly and with no lingering issues).
So much of tkr recovery is individual. It it important to listen to your body and think in terms of increments.
United States