From a very nice article on the birth of Skype:
"I remember wondering: how can they be so good?" he told me, speaking about the Estonian core of Skype. "How can such a small group can do so much so quickly, compared to typical development efforts in, for example, Microsoft? I had the impression that maybe coming out of a time of Soviet occupation, when computers were underpowered, you had to know how to really program, effectively, parsimoniously, being very elegant in sculpting the programming code to be tight, effective, and fast. [That's] not like in Microsoft, which has a very lazy programming environment, where programs are created that have memory leaks and all sorts of problems, that crash all the time and no one really cares—because it's Microsoft!"
See here for a similar opinion.