After watching the Chrome Ads, i jumped over to the site and by golly, it really flies. Do you have any idea what they're running? I checked google/stackoverflow/linkedin for clues but came up with nothing.
Looks like ASP.NET from the .aspx file extensions<p>See Netcraft:
<a href="http://toolbar.netcraft.com/site_report?url=http://allrecipes.com" rel="nofollow">http://toolbar.netcraft.com/site_report?url=http://allrecipe...</a><p>Presumably this is some of the hardware they are using:
<a href="http://www.f5.com/products/big-ip/" rel="nofollow">http://www.f5.com/products/big-ip/</a><p>Content Delivery Network for media (images, css, js):
<a href="http://toolbar.netcraft.com/site_report?url=http://images.media-allrecipes.com" rel="nofollow">http://toolbar.netcraft.com/site_report?url=http://images.me...</a>
<a href="http://www.limelightnetworks.com/" rel="nofollow">http://www.limelightnetworks.com/</a><p>You are correct, it is quite fast.
Yeah, that's interesting. One thing to note is that they don't sprite their small images, which is one of the first things people recommend for improving page load time.