From my own POV, in the weeks after my own TKR, just one, I had a ton of things going on. My own therapy, blood draws at the hospital for the blood thinners, my wife was in the hospital 30 miles away... I went back to work at 5 weeks, but had an ice macine available and a sympathetic group around me allow ing time to put the leg up and rest. I had issues much as Tim did, though my lady friend that did my home PT is still in my head. Reminding me to get my feet pointed straight, don't limp (geez, you walk like a sailor! Rebecca, I'm a retired sailor and don't forget it!). If the folks I work with weren't as accomodating as they were, I would have had to take another couple weeks.
Look, I know I'm one of the oddballs when it comes to the healing game. I'm up walking about after breaking my neck and back barely 4 months ago. I'm no superman, I'm just healing. So you can take my comments with a grain of salt, the size of a cowlick perhaps. I like talking with knee patients at PT, my therapist though prefers I don't mention MY ROM though. He doesn't want his people getting discouraged or hurting themselves trying to match.
In the end, everyone heals different. I can hope and dream you heal as I have. I also know you will be one to push limits and I hope they don't push back too hard. Allow the for twelve, and if you are back sooner, hey fantastic. Good luck brother.