Thanks to everyone who replied....I'm encouraged that the rates of recovery time seem to vary for everyone. I'm 8 weeks post op now, and I have to say I'm experiencing little improvement.
I am on my feet and walking, but I still have a lot of stiffness, aching on the inside of my knee and also on the outside left just beneath my kneecap. I live on a 6th floor walkup in NYC, so I'm not sure what impact that's having on things. My knee is also very hot to the touch most of the time.
My OS hasn't recommended PT. He just said "You're active, you'll be fine". I've been following a pretty dedicated quad building programme on my own, and seen my old PT a couple of times to get a workout programme, but I kind of feel that that I should have been given more guidance and also that I was led to believe that this was much more minor surgery than it's turned out to be. The reason i had my surgery in April was so that I could have "an active summer". I had plans to do a sprint triathlon in August, but that's clearly not going to happen.
I hope you're all feeling better and that you don't have RSD, 'stillhurting'. Thanks for all your replies.