All links are listed in order, from most recent to least recent.
Latency reality check: Early findings show that desktop latency ranges from 65-145ms [study]
Web Performance Today - Apr 3, 2012
Summary: Survey of 3 million web users finds that median desktop latency is much slower than the 20-30ms that most site owners estimate.
M-commerce site performance hampered by Verizon [article]
Internet Retailer - Feb 15, 2012
Summary: "The amount of time it takes to load a page from a web server to a smartphone is dependent on many factors, but the efficiency of a wireless network is a big one—and one that is completely out of the control of a merchant."