If you compare the rate of resolutions for just valid bugs (meaning reproducable, not by design, and not duplicate) submitted by customers versus the internally submitted ones, the fix rate is almost the same and we're "Won't Fix"ing fewer customer issues.

Bugs Internal  MSDN PFC Suggestions Internal  MSDN PFC
Fixed 79% 78% Fixed 23% 19%
Won't Fix 14% 12% Won't Fix 44% 30%
Postponed 7% 10% Postponed 33% 51%

Marie Hagman

Visual Studio Program Manager