P.S. We also have an internal site for BETA testing of 3.40 - http://demo-340.nopcommerce.com/. Please have a look
Paging loading speed is quite good - http://tools.pingdom.com/fpt/#!/B6osC/http://demo-340.nopcommerce.com/ (perf. grade 98/100)
PageSpeed - https://developers.google.com/speed/pagespeed/insights/?url=http%3A%2F%2Fdemo-340.nopcommerce.com%2F&tab=desktop (90/100).
P.S. None of our competitors has such good grades. FUrthermore, they are MUCH lower =))