Hang while loading assets, Shader.Parse ?

I've loaded an app onto an off-brand tablet and notice that it usually hangs for quite some time when loading assets, whether it be from a script or from Resources.Load.

Poking through the profiler and logcat i find these things. It's something this device isn't liking with some shaders. Can anybody shed some deeper insight onto what's going on here, or what I can do to alleviate my issues?

 D/Unity   ( 6944): WARNING: Shader 
 D/Unity   ( 6944): Unsupported: 'Hidden/TerrainEngine/Details/BillboardWavingDoublePass' - Pass '' shader state not supported
 D/Unity   ( 6944): WARNING: Shader 
 D/Unity   ( 6944): Unsupported: 'Hidden/TerrainEngine/Details/Vertexlit' - Pass 'FORWARD' shader state not supported
 D/Unity   ( 6944): WARNING: Shader 
 D/Unity   ( 6944): Unsupported: 'Hidden/TerrainEngine/Details/Vertexlit' - Setting to default shader.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): Warning: Creation of shader 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' failed.
 D/Unity   ( 6944): WARNING: Shader 
 D/Unity   ( 6944): Unsupported: 'Hidden/TerrainEngine/Splatmap/Lightmap-FirstPass' - Pass 'FORWARD' shader state not supported

Note that it never crashes, just stays on the same frame for a few seconds before giving up and finishing out. I'm going to keep plugging away and see what I can disable or remove to get this working reliably.