Here is a quote from an email I sent out on the Brazos Valley Web Design listserv regarding Microsoft's lack of compliance with the W3C standards:
I think that it's helpful to realize that Microsoft's browser is in effect a de-facto standard, which by overwhelming user preference is preferred over the W3C-compliant Mozilla. If you think of MS as the U.S. and W3C as the U.N., it's easy to see that the "consensus" of a bunch of undemocratic, oppressive regimes is not any more valid that the individual judgment of the freest, richest nation on earth. The analogy is better than you might imagine, since both the US and MS are being derided precisely because of their virtues (freedom and successful products) by nations/companies that are failures precisely because of their flaws (tyranny/bad products.)