The new search package (openfts) gives more weight to words in the title, so it's likely that it might do better. I also noticed that if you first go to a particular forum and search, the search will be restricted to that one forum. Searching on schedule in the Openacs 4.0 Design forum page will yield better results (5th entry) than seaching from the Openacs Community Discussion Forums page (~= 41st entry).
For openfts, it's also possible write to write a custom scoring function that would allow more restrictive searches using boolean operators, wildcards, exact matching, etc. I haven't looked at the openfts stuff in a while, so it's possible that new scoring functions are already available.