We have all had good and bad experiences with the new market google has given to us, as my LG optimus 2x is very fast with it but my Samsung Galaxy tab it is way to slow for me to deal with. Some of the speed issues are due to hardware but they are also linked to your WIFI and DNS setup. The slow market problems has been driven down to slow DNS resolution.
As always the fix for this problem has been found by the android community in this case a user called temasek over at XDA Developers. After some looking around and frustration with the slow market he eventually found the new market URL v11.lscache3.c.android.clients.google.com is the soul cause of out slow loading market times when on WIFI. To help out the communtiy there is an app called Set DNS avalible on the market now. Once you have downloaded the application, open it and select OpenDNS server, and click Apply to set the DNS settings and thats it your all done!
The speed improvements may suprise you as we all like that extra little bit of speed.I If you like the app feel free to support the developers by helping yourself to the paid version.
Market Link: Set DNS