MySQL Quashes Defects in Database Release: "MySQL AB on Monday released Version 4.0.17 of its MySQL open-source database software. The update features a number of cleaned up code defects that were recently sniffed out by an independent inspection company.
Reasoning performed its independent analysis using defect density as a prime quality indicator. Defined as the number of defects found per thousand lines of code, MySQL's defect density registered as 0.09 defects per thousand lines of source code. Through its analysis, Reasoning concluded that the commercial average defect density—covering 200 recent projects and totaling 35 million lines of commercial code—came to 0.57 defects per thousand lines of code."
Empirical evidence of the Open Free Source Software model contributing to high quality code.