Simsi - 8:15 pm on Jan 15, 2013 (gmt 0)

because I'm pretty sure that mobile users use the web significantly differently than desktop users

Exactly the reason I want to do this. For me, "mobile" doesn't necessarily just mean "on the move", nor even "restricted viewing area" anymore but it does probably mean "less time", "more impatient" or "slow connection" lol.