*MY* anedotal data (Score 1)

Two servers, names changed, both behind firewalls, both "less important" and "less exposed" (because EVERY *important* Internet-exposed server is going to be patched regulary, right?)

Windows 2000:

C:\uptime
\\SERVERNAME has been up for: 132 day(s), 22 hour(s), 48 minute(s), 12 second(s)

Linux (Slackware 9.1):

SERVERNAME:~: uptime
  13:19:51 up 218 days, 20:53, 1 user, load average: 0.00, 0.00, 0.00

See, you can get good runtimes on anything when the conditions are right...

Did I prove anything? Nah...