In the past, when my mortgage company did an escrow analysis, they would send the check with the analysis. This has happened to me twice. Just recently, we had our escrow analyzed and instead our payment is going down by a few dollars (less than 20 a month). No check this time. I am not sure how they calculate or when checks are issued, so I'd call and inquire if I were you. I hope you are getting one-wouldn't it be nice to have an extra $1100 right now?
It depends on how much overage there is. By law, they are allowed to hold a certain percentage. I can't remember what it is off the top of my head here in NY, but when this happened to me, i felt it was surprisingly high. And they always hold the maximum they are allowed to and only refund over that. That was one reason I didn't want to escrow taxes and insurance for this house, I didn't want the bank randomly holding $1500 at a time that I could never access.