App slow to return to AR scene

Hi,

I'm creating an Augmented Reality App for Android where you go from an AR scene to normal 2D scenes and back again. The trouble is, it takes around 20 secs to go from any of the 2D scenes back to the AR scene.

I'm using the simple Application.LoadLevel script which works fine when testing on the Mac but is ridiculously slow on a tablet, even though its the top android operating system.

Is there any way I can speed this up?

Would really appreciate any help

Thanks