My sister and I never crawled at all... but then, we were never placed on our tummies and had one of those walker thingies.

My DS is 5 months, has been able to stand (supported, of course, but holding his own weight) for months, almost since birth in fact, can pull himself up to standing from sitting, does little steps (bending his knees to do this) - and he holds our hands, not us holding his hands too. I can see him having a very short crawling phase, if he has one at all. He really hates being on his tum, even when he accidentally rolls over and puts himself on his tum (he can lift his entire upper body with his arms too, looks like he's attempting push ups some of the time!). DS can actually stand alone now, but is so wobbly I don't let him - LOL, well, I try to grab him when I see him trying to do it.

Anyway, I wouldn't be concerned if my DS doesn't crawl. I take him to an osteopath too - another forceps baby! Hey, I was forceps too, I wonder if forceps babies just don't like to crawl?