Thanks in advance.
Gene
What do you mean "hits"???? Do you mean replies? If so,just count the 
posts in the thread. If you mean hits via 3rd party searches on the 
subject, then Google's stats will be misleading.
Reason:
Main reason is that the subject line (I assume that's what you'll search 
on) is unlikely to be unique. So even for quoted string, Google will 
count all pages in which all the string appears. For an unquoted search 
string, Google will also count all pages on which part of search string 
appears (so the count will be higher.)
HTH
wolf k.