Funny you mentioned that, today I just noticed that most of the sites I've optimized lately have comparable rankings in both engines and only AV seems a bit out of touch. :)
As long as I keep that .0025-.003 link ratio (Google's inbounds divided by ATW's inbounds) I see similar results in both engines. Drop below .0025 and the disparity is noticeable. Not much of a metric, but it's the only one I have.
It seems to me that with solely on page factors Fast Google and Inktomi are presently quite similar, I have a page that's no.1 on all three, but the keyphrase is fairly obscure and uncompetitive. It's when off-page factors come into play that major differences appear.
@vitaplease I agree: domainnames can be very helpful, and subdomains as well, though getting of staticrank might be more difficult in this case. (--> [keyword.domain.com...] or [keyword.domain.com)...]
Interesting thread. I am looking to improve my rankings slightly on FAST and Ink. On Google I'm seem to be OK, but am slightly lower on the others. Is it worth buying something like WPG to get the page set up correctly, or should I be concentrating on external factors (such as link pop) instead?
Also, is it worth looking into xml feeds for an engine like Ink, or does pay for inclusion suffice? (I am currently listed without having paid anything).