Don't let him make you feel bad or abnormal for what you are doing. I got really lucky and had completely supportive ped's, although they weren't as educated on the problems I had in the beginning, but the hospital's support group helped me with that.
I also think its sad when the medical profession doesn't recognize what has been shown to be beneficial. That said, maybe he didn't quite mean the milk comment they way it came out. We started giving dd a little milk (rice milk because she'd had some issues with dairy) at a year just to give us more options and start to get her used to it so weaning would be a little easier, and it did lead to me finishing the weaning process around 14 months, which was pretty much what I was aiming for. I have to say though, her sleep problems did not magically go away. That was my last hope besides waiting for all her teeth, and it didn't work out for us (I had several friends tell me that the final sleep issues went away when they finished bf--and these were people who waited until after the first b-day to wean, so I was hoping for a similar experience--oh well).
Enjoy every second of it and try to spread your knowledge--if people don't know, they can't be supportive.
~Kim