The game I am currently attempting to port (titled Invasion) has been tested without issue on the following platforms:
All of these on multiple PCs ranging from gaming desktops to low-end consumer laptops: Firefox, Chrome, Internet Explorer
It is also published in the Windows 8 store & Chrome Web stores with no serious performance issue observed on any device
Here's a link if you wanna check it out: https://chrome.google.com/webstore/detail/invasion/iiidfeplciebbddgioelhkbmgjfjelcj?authuser=2
Samsung Chromebook - no issues
Phones:
HTC One (2013) - Chrome - easily 40 - 60 FPS
HTC One S (2012) - Chrome - 10 - 40 FPS, but playable
Galaxy S2 - Stock Browser - 10 - 25 FPS, with crappy resolution, but still playable
IPhone 5s - Safari - easily 40 - 60 FPS
The other game was tested on the HTC One back in February using Chrome, it was merely a POC with a crappy architecture that gave crappy performance, but while it was playable in Chrome (at ~15-25 FPS), porting it with the XDK dropped the performance significantly to where it would barely load.