At drinks with a friend the other night, the subject of "Top Chef" and other food television came up, and he remarked that his early twentysomething sons watch more than a few cooking programs, as do many of their friends. He'd overheard the discussions that attested to that. But none of these young men, he said, were home cooks. Nor did they seem to aspire to be. They just like the programs, and not solely the ones, like "Top Chef" and its imitators, that have elimination-competition suspense built into them. They like more straightforward cooking demonstrations, too.