If it is super cold out not much is going to keep your fingers from being cold eventually.
You got to be able to tie knots,pull line, unhook fish,untagle snags and such and when you do they will get cold.
Carry a small towel and wipe your hands off when wet. My hands get cold but U can warm them up enought to continue. But my feet, oh the feet. They are my undoing.
I gots these- the neo part dries fast and is somewhat warm when wet. Relatively cheap.
http://www.basspro.com/webapp/wcs/stores/servlet/Product_10151_-1_10001_84938_175008003_175000000_175008000?channel=froogle&mr:trackingCode=775BC8AF-03A7-DF11-904F-002219319097&mr:referralID=NA
I imagne these are pretty warm.
http://www.glacieroutdoor.com/products_fishing.php