There are few threads on corn syrup. Commercial beekeepers (but not only) use corn syrup since it is cheap. It is as far as possible to what bees would use; i believe (only personal belief shared by many others) it is un-natural and harmful to bees. They will not overwinter as well on HFCS as on honey, with sugar somewhere in between. The best is not to have to feed, leaving enough honey to the hive, robbing the strong to give the weak (w/out endangering the strong), storing honey frames for later...
Ultimately it is almost a "philosophical" question, your philosophy of hive management.