It's no longer a debate. The original team said it's a security feature (which, by the way, can't be edited out since it's been up on the official blog long enough for the internet archive to catch it), so it's a security feature. Saying otherwise indicates
laziness or fear on the part of those who don't want to fix it.
Anyway, I posted what I think is a good enough solution in my post: just ask the user upon first-start which UAC mode he'd like to use while informing the user that convenience comes at the cost of security.
@charles, shh. The UAC team disagrees with you, so I doubt you can say otherwise
(I love you too. I'm being hard on you for the good of the users, that's all)
Please, let's argue semantics more. I didn't say it was or wasn't a "security feature" what I said was it does not offer significant security benefits.