There's one on youtube comparing Oakley M Frames to another brand (ESS or Revision maybe?) doing a shotgun test at a military range. The M Frames are the clear loser in the test.
Funny thing is you can see where the wad rips the M lens apart and when the pairs from the brand putting on the test are shot at the wad misses them. The M Frame takes the shot just fine but gets creamed by the concentration of the center of the pattern and the wad cup.