Robert_Charlton - 12:07 am on Aug 11, 2008 (gmt 0)

I've done research on educationally-oriented keywords, and I've noticed that Google does get a larger knowledge-oriented demographic than the other tools had shown.

WordTracker has such a small sample size and such a poor demographic that I found them useful only for checking middle of the road searches with a fairly high volume.

Trellian's Keyword Discovery is an interesting tool, one that I've liked within its limitations. Until the Google Tool added numbers, KW Discovery was the only tool that gave really granular data with numbers. It was, in fact, the KW Discovery numbers I had that told me instantly that the Google Tool was dropping some major phrase data last month (as reported elsewhere, this has been fixed).

That said, the Google tool is now working, and I can't imagine using anything else. I might occasionally double-check some things with the Trellian Tool, but chances are I'll do that less and less as time goes on.