It is fine to pitch at 55. I bet the yeast are going crazy right now as I am writing this. Also, if you have a 12 gal pot why aren't you doing full boils?
Thanks for the info. I have it sitting near a heater now and the temp is up around 66-68 degrees so should be good to go. It is bubbling away like crazy. I was going to do a full boil, but I had purchased hops assuming only partial boil, so just decided to stick with that. Next time I will do a full boil. What advantages does a full boil have though over partial boil?