[justjimmy]

Gmail, Twitter, Facebook, Yahoo, Instagram, Flickr, Amazon

Are the ones I got.

Actually thought Square's was bootstrap.

The the average user, buttons styles may not mean much if at all, but for those that with a keen eye and pays close attention to minute details and pixels, it's quite telling which button belong to which brand.

Saw #4 and was wondering 'What the fracking frack? Is my Little Pony Friends part of this test?' Then I learned it's Microsoft…

The 'easiest buttons to identify for me was Facebook's and Google's.

[andyking]

I thought #11 was Amazon (it looks just like the buttons on Kindle) but this could have been because I was reading my Kindle on the tram home, and it was the last example of such buttons that I saw.

And I've never heard of Svbtle.