Glad to hear that your healing has gone well!
I had my surgery in February 2009, and it took me a while to recall spasms, but yes indeed...I definitely had them.
For me it was when I didn't chew my food to a complete liquid, or ate something that didn't chew well. It would stick at the wrap, or have difficulty going through. I remember one time in particular, when I'd eaten a (believe it or not) cherry tomato, and thought I'd chewed it enough. OUCH!
Having a cup of tea handy is your best bet. I always try to remember to have water nearby. No ice! That day, I tried to wash things through with ice water (we were at a restaurant) and the spasms were horrible.
So yes. Spasms are common, I think (especially judging from your responses here). They don't last forever, but you need to eat very carefully to keep them at bay.
Good luck with your continued recovery!
Eat slowly, and chew, chew, chew!