Cube map performance on Android

Hello all,

has anyone some numbers about cube map performance on Android mobile devices versus standard texture performance in a shader? I think it could be optimized to be the same speed on hardware level, but I do not find any information on this.

So the question is: if I use a cubemap instead of a Texture2D in a shader, will I get a performance hit? And if yes, how much performance is lost?

(I think this is pretty much an OpenGL ES 2.0 question, not a Unity question)