Leopard in February? I dream so but I don't think so.
I don't think anyone is saying Leopard would actually ship in February. But it would be reasonable for them to finally unveil the "Secret features", etc. that they've been holding out on. I mean, people expected Apple to show these off at Macworld, so February 20th is about time.
I don't know that they would unveil it and then be ready to ship it in March, but who knows.