Sorry but all rubbish. It's lighter in installation than even Vista Basic (so far, bearing in mind it's beta status), quicker performing even than XP on some machines (may depend on drivers and other 3rd party factors) and otherwise rather efficient. Certainly more so than my Vista installation, although that doesn't say too much.
I will certainly agree it's a fairly hefty set of tweaks to Vista and that it's what Vista should have been, but that shouldn't detract from it's status as a quite possible decent OS.