I just tried mine (roughly timed, from click on EPG to page load complete, iPad):
HDR1 - 55 services, 7 seconds
HDR3 - 72 services, 8 seconds
HDR4 - 55 services, 7 seconds
If there are significant delays which can't be attributed to the network or the browser device, and the HDR isn't busy decrypting or advert detecting, check your HDD out.