Allen, I've got it set up on a shared server, but we only share with 1 other site, so we don't have a problem there. I imported 190k posts, and it runs as slow as you've mentioned -- 15 to 30 seconds, depending on what I have turned on.
I started playing with it, turning things on and off, and making notes of the times. Here is what I've found after LOTS of playing :
Empty, all off Generated in 0.028 seconds. 4 queries. Zlib compression enabled.
Searchpal3 Generated in 0.024 seconds. 4 queries. Zlib compression enabled.
If nothing else, it at least gives you an idea of what to turn on and off. I've found the Hot Topic really drags it out, as well as the poll, if you don't have a specific board specified for the polls. I also only have 1 forum specified for the newspal, because Dave mentioned that narrowing the boards down to 1 might help (it did.)
I still really like it, I hope 5.0 helps with some of the pals though, because I'd love to add more.
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I've found the Hot Topic really drags it out, as well as the poll, if you don't have a specific board specified for the polls. I also only have 1 forum specified for the newspal, because Dave mentioned that narrowing the boards down to 1 might help (it did.) 
