This can also be stated as the “Linux is amateurish” myth. This is usually posed in some sort of security context, but covers a whole realm of misconceptions about Open-Source software development in general, and Linux in particular.
The fact of the matter is that, in general, open source software is likely to be less amateurish than closed source software for one simple reason: peer-review. The preceding sentence is based solely on my own reasoning ability and is not the result of any exhaustive comparison of the relative security and reliability of the two approaches.
For the exhaustive test-case that was used in an independent head-to-head reliability test that found that open-source Unix systems and utilities were less fragile � crashed or hung less often � than their proprietary counterparts. The paper describing this test is available here (PDF).
These are the ramblings of 
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