Wow, that's a lot of snippet and chunk calls for one page. You might want to try profiling the page or removing selected parts to see what's taking the most time. The JS, the If snippets, the galleries, and the getRelated snippet could all be slowing things down. It could also be a function of the database server being overloaded if you're on a shared server.
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PLEASE, PLEASE specify the version of MODX you are using . . . PLEASE!
MODX info for everyone:
http://bobsguides.com/modx.html
