glitterball - 1:21 pm on Apr 5, 2007 (gmt 0) I do think that the results for commercial single word or popular two-word queries have improved.
From a user's perspective, one negative aspect that I have seen over recent months is the disappearance of extremely-specific technical forum pages (I presume into the supplemental index).
A year ago, you could copy and paste an error message into google and it would usually return a couple of forum threads (normally with a solution or workaround). Lately I find it impossible to find solutions to technical problems through Google.
i.e. A search for Blue Widgets seems to return the market leading blue widget retailers.
I do think that the results for commercial single word or popular two-word queries have improved.