I have one boy who comes and one who will hide. If I give him a 5-minute warning, he'll spend it hiding (in a very obvious place, usually, like under the coffee table) instead of actually playing! And then he sobs and cries and swears it's "the worsest day ever in the whole entire world."
More often than not, I end up throwing him over my shoulder and hauling him out like a sack of potatoes.
Even better, I had a friend witness this (DS was leaving her house) and she said that Love and Logic would "fix all of this." Hmmm...yeah. I've read the book, and although I really could use a refresher, I felt really judged.
Something we started just today is taking some time away from them. This is actually a suggestion from the "judging" friend. She says, "you didn't obey me, so you're going to bed 5 minutes early tonight." And if they don't do it again, it's 5 more minutes. I didn't think that would work with my boys, so we started with 10 minute increments. I don't know if ti's going to work, since they're master stallers and don't get in bed at 9 on the dot even on a great day.
I've found the thing being taken away has to be immediate to work really well. That's why i'm doubtful about this bedtime thing. Taking away story/reading time before bed has worked wonders--for getting my boys to brush their teeth before bed. it's like my kids don't have the foresight to realize at 10 am that they're really going to hate it when bedtime rolls around 1/2 an hour early, because the consequence is 10 hours away. And it's not 'cause my kids are dumb, they're not. I think it's either part of personality or just a developmental stage.
I've got to do better about this and think of something immediate that I can threaten to take away, but it's hard.
I would like to point out that you are probably only seeing the good kids running when their mom calls out that it's time to go home. You're not seeing the other moms who are don't even bother to call because they know it won't work. Or maybe the kids who come running are going somewhere else fun, or have been bribed by fruit snacks that are waiting in the car. I know it can be embarrassing, but don't compare the things you have trouble with to the things that other moms don't have trouble with. I guarantee there's something your family sails right through that other moms are pulling their hair out over.
Let me restate that: women tend to compare their weaknesses to other women's strengths. And the only good that does us is to make us feel bad about ourselves.
Good luck!