Starting with all mobile (phone + tablet) traffic to developers.google.com over the last 30 days, this is a plot of that traffic by the css pixel width of each device's viewport.

First, hover to see which specific widths are the big spikes. Then, click the button below to view which devices this traffic is from. Sometimes you'll see the spike is due to one populate device (768), othertimes many smaller ones (360).

paul irish. july 1 2015. Ironically, isn't completely mobile friendly and i'm sorry.
github repo