Gates: "We've gone from little over 40 hours on average to 24 hours. With Linux, that would be a couple of weeks on average." 2003-10-15 (Same Interview: We invented personal computing.)
Bit off topic as well, but how about throwing in these little gems:
"The Internet? We are not interested in it" - Bill Gates, 1993
"Sometimes we do get taken by surprise. For example, when the Internet came along, we had it as a fifth or sixth priority." - Bill Gates, Jul, 1998
"We had planned to integrate a Web browser with our operating system as far back as 1993" - Microsoft (27 Jul 1998, filing its first court responses to federal antitrust)
"If you can't make it good, at least make it look good." - Bill Gates
"The next generation of interesting software will be made on a Macintosh, not an IBM PC." - Bill Gates, 1984