Bing is definitely faster and more regular on new sites. Seen it time and again. But I don't know if that matters in the end. Certainly not as much as update speed on the major sites, where Google is very good.
Pretty anecdotal. In that vein, I definitely see far more google IPs in my app logs when they are new and have no traffic. When I see traffic that isn't someone with a beta invite or some bot trying to find a PHP exploit, it's pretty much always google.
In fact, I just checked on two sites right now and I'm seeing 66.249.67.152, 66.249.67.49 and 66.249.68.123, all of which are googlebot. I see one yahoo IP (67.195.111.167) and nothing from msn or bing.
I went back and looked, and on my three newest sites, Bing was first by several days. Oddly, Yahoo is my most frequent on those. Not the case with older sites.
Maybe it's more random that I would have imagined.
