I recently bought a unity template (match 3 game) which runs absolutely amazing.
There is SO many animations, particles and physics.. No lag at all, runs perfect on all of my phones.
I created a similar game in C2. But only with one animation (5 frames) and the game lags on 8 out of 10 phones.
Not sure about bottleneck, as an issue
not quite sure what to think anymore. native is not better? - not buying it