Actually, I'd still prefer that the word size be reduced to 3 chars because if, for example, you searched for "AMD SKT 939 A64 CPU" you'll still end up with zilch. There's just waaaaaay too many very important three letter keywords and common abbreviations.
Yes, in TOF, the search was limited. I'd have to not use the default time length. (Usually putting it at one year works fine.) And yes, you had to be intelligent enough to know that if you're searching for a CPU post you should probably look in the CPU forum instead of all of the hardware section. But with a little user intelligence it worked.
Where as missing so many highly important keywords because they're only three letters long doesn't work nearly as well. I'd much rather see TOF's single forum limit than TNF's three char limit.
If there weren't so many highly important three letter words I'd probably see it differently, but there are, so...