Quoting Leah Bee:" I have been wondering the same... DD can pull up very well on anything BUT she won't really cruise. She ... [snip!] ... hands though. She just turned 9 months. ETA: Anytime she does walk it is on tip toes... it is kind of starting to worry me."
Tip toes is totally normal, I've looked into it cause a friends baby did that for ages and she couldn't research it on her own.
Its not that DD can't walk with assistance, its like she just can't be bothered cause she can crawl faster. If she really wants something a foot away she'll cruise to it... But for the most part she's just like Meh!