littlecubpanda - 9:15 pm on Jun 18, 2013 (gmt 0)
Tablets have a very high CTR, mobile is second, with desktop a somewhat distant third.
Tablet/mobile is 2/3rds of all traffic (thankfully). My sites aren't really optimized for them, especially something like an iPhone, but I got all the graphics, ads and text smaller and they should be appearing much better than they were before. I use 336x280 for everything.
Here's to hoping tablet use continues to rise.