https://knowyourmeme.com/memes/subcultures/ctrlaltdel

Scroll down to the "Reception" section, it's in the first paragraph. It's hard to get the full effect from that paragraph though, as B^U became an automatically response to anything Buckley or C-A-D related for a long while. It was more of a textual social meme than an image macro'ed meme so it doesn't cast as long of a shadow today, but I'll always associate Tim with B^U first.