From your link though, Leslie Lamport disagrees with Knuth (whom I like to pronounce "nuth" but is actually pronounced "ka-nuth").

I'm Greek and I pronounce LaTeX as "LAY-tek". I just tried pronouncing it "LAY-tech" with a Greek "chi" sound ("λέει-τεχ") and I sounded so silly I almost spat my coffee all over my monitor (only "almost" because I wasn't drinking any coffee). Ain't no way I'm calling it that.

And note that, being Greek, I can actually pronounce "χ" correctly. Most Native English-speaking folks I've heard trying to do the same sound like they're in immediate need of someone administering the Heimleich manoeuver to them.

Btw, I pronounce "Heimlich" with a Greek "χ" also. I bet most native English-speaking folks pronounce it elsewise. Perhaps as "Heimlick".