[Zope] snappier zope.org/how to make sites as snappy

hi all it looks to me that zope.org is reponding better than previous days. what was done? any tips on how to go about this? my site (http://www.emedia.com.my) currently suffers from long latency between the request and loading the page. tables may be the cause but a request for normal html with no tables (try the printable page) still responded poorly. i've increased the cache numbers in Control_Panel. i've also increased the thread numbers. i've moved graphics to be served by apache. so, i'm pleading for knobs i need to turn, things i need to change, etc i'm using zope2.2.2, ZEO0.41, on rh6.2 with 4G RAM maybe something i overlooked, or don't know thanks