In my experience with websites, Bing do index first then Yahoo then Google. It is so easy to get high rank at Bing and Yahoo, but it is so difficult to that with Google.
Bing and Yahoo quite quick, but you need to make sure which coverage youre aiming, i.e: .com, .co.uk etc
Well, this question is not as easy to answer as we think. Some people will say obviously Google, go to your site's webstat and see actually who is indexing and how frequent. If you check it on regular basis, you may form a different idea.
Google indexes your website quickly then its other competitors. Won't be surprised to see your web pages in their search result few minutes after publishing it on your website or blog Ashish Patel affiliate marketer & blogger
I don't even check Bing and Yahoo anymore unless I have free time. Google does index pretty fast, though, especially compared to how things used to work.
It doesn't matter who indexes first, the thing is that you should have a prominent position in all three. That is the real key.