Forum Moderators: open
[edited by: martinibuster at 2:01 pm (utc) on April 28, 2003]
Search engines parse the text before analysing it, and it is (to me) inconceivable that they should do anything with comments other than discard them.
Empirical answer:
Several crawls ago I put a comment in my home page with a unique string. Goggle does not find that string.
When the theoretical and empirical answers are the same I think you can trust them :)