Not to be boring, but if you are looking for ecommerce best practice, I'd look at Amazon.
You have got to be kidding. Unless you enter unique keywords Amazon typically gives you hundreds of results on many pages with seemingly irrelevant items at the top. Furthermore, you have no way to drill down within the results or even control items per page. Item pages do contain tons of info, mostly long scrolling pages of clutter trying to read your mind and suggest related products, promoting their baby registry or wedding registry or wish list, asking you to rate the product, etc.
If LP tried to display all that data you would feel like you're using a 2400 baud modem. Amazon has huge server farms and I think the page response you mention has more to do with the back end infrastructure than the front end design.
LP site is way more user friendly, allows you to control number of items per page or All, enlarges the picture when you hover over it (Ebay does it too, Amazon does not), and allows you to drill down further based on checkboxes for brand or style. The item detail pages provide tabbed access that minimizes page scrolling. I find a simple click to be less of a hassle than constant scrolling.