Robert_Charlton - 7:41 pm on Jul 13, 2010 (gmt 0)
...these are definitely legit accesses, not bots, in particular as a possible rel=prefetch access (for top-ranked search hits under Mozilla-based browsers) directly preceding the actual user-driven access still _does_ contain the full list of Google search parameters in the referrer.
lammert - Thanks. There seems to be a punctuation mark or word missing from what you've quoted, though... so just to make sure I'm understanding... does this mean that these are extra referral reports, reporting the prefetch accesses without referrer strings... but that the actual user-driven accesses still do contain referrer strings?
If this interpretation is correct, then would it make sense simply to ignore the referrals without the referrer strings... as least when looking at actual visitors?