It depends on the child, of course. Some kids are born to love learning, and others need to be . . . convinced.
I skipped kindergarten, so I don't have much to compare it too, but my son is in in kindergarten now, and it seems to me that he's doing the kind of work I did in first grade. He was well prepared, and he's doing great, but there are some things that I wish they didn't push them into. For instance, he gets homework once or twice a week. It's usually a single math or phonics worksheet, but after seven hours of school, he's completely beat and has a lot of trouble focusing on homework. He also doesn't get quite enough recess time, andI know that little kids really need to burn off energy throughout the day so that they can sit still and concentrate when necessary.