I have been working on developing hybrid apps since last 2 years or so and while i am a huge fan of web technologies and i love creating UI's with css and html, the fact that always stands out is that the end product that you get with a hybrid app can't match to its native counterpart on Android at present.
On iOS i must say there is very less difference between both of them and i would fully recommend going for phonegap if you are purely developing for iOS.
I have been trying to improve hybrid app performances by using various optimizations but there are certain limitations of the environment (webview) due to which phonegap apps fall behind native apps. Hence there will be some noticeable difference in the app when compared to native.
The industry is growing and we are seeing platforms such as ionic which are trying to close the gap as much as possible but as far as i understand unless there are significant changes to the underlying platform that hybrid apps run on, it will always be lagging its native rival.