My DS commando crawled for about 8 weeks before working out that the "proper" crawl technique. He's now pulling himself to standing on EVERYthing, and starting to cruise around a bit more. But if I try to "walk" with him, he's got no idea. My niece never crawled, just bum shuffled, and absolutely hated standing, until around 16 months. Then she started pulling herself up, and now at 18 months she's walking as though she's always been able to do it. They're all different, and as Trillian says, ever seen an adult who crawls - I'm sure your DD will be just fine, but it is exciting watching them learn new things.