Motorola issues

I have experienced a very frustrating issue with Unity Android. i released a game called Air Wing (https://market.android.com/details?id=com.mcneilly.airwing). I am experiencing high volume of complaints and poor ratings almost exclusively from owners of motorola devices. It appears Unity engine has poor frame rate on Motorola devices. Are you aware of this issue ? do you have any workarounds? unfortunately these poor reviews have significantly slowed downloads of my application.

Please any assistance is greatly appreciated!!