I've published one game using Construct2 and CocoonJS on the Google Play Store as well as the Apple App Store. It's a simple tap-tap football game. I get amazing performance, fps from 45-55. It does certainly depend on the hardware capabilities of the mobile as well but luckily we haven't faced much trouble.
We too are waiting for Ludei to enable developers to remove the splash screen and provide better support with a reasonable pricing scheme.
We haven't tried appMobi yet, but we shall try it for our next game.