I, too, like "uncarps"*, but I have horrid memories of blanks in winter on ponds that only contained our "natives" -roach,rudd,bream, tench, perch, and possibly crucians - they are all happy to shut up shop completely, for weeks.
My first trip to a commercial in the winter was a revelation - lightly loose-feeding hemp and caster, as though I were after very ordinary chub on a stream, I was into roach and skimmers straight away,and got seen off by the occasional carp.
I can only suppose - and I'm not the first nor the best qualified to - that above a certain stocking level, carp not only keep feeding in the cold, but keep barging into all the other types who were just trying to have a kip - whereupon they, too, feel the need for a snack...
I'm glad I didn't post this yesterday when I wrote it, because there's a glaringly obvious alternative explanation - more feed goes in daily in a commercial than in a woodland common pond, and it may be the constant availability of food that keeps winter uncarps on the prowl.
Proving this would mean a fishery owner running a successful winter match series (to keep the feeding fairly continuous) on a lake with no carp - quite a gamble!
The down-side of not posting yesterday is the chance that this has now already been said, better, six times ...
*But I don't like the term "silver fish" - tench, perch, and bronze bream aren't!
"Silverfish" is even worse, these are wingless insects that live under the bath. They have a fascinating family life (honest!), but are not fair game on rod and line.