I'm glad someone resurrected this thread (I am the original poster, btw), as I have finally had a chance to sample the 2 brews made with this non-boiling kettle.
Both are still young and still not in the expected drinking window yet (both are lagers) but both taste quite nice already. Relieved, and even a little bit impressed at the rauchbier I just tried today. (The other was a dunkel.)
I should make it clear that neither of these really reached even low-boil stage. The surface of the wort was almost smooth, no bubbles nor ripples nor even waves. You could see the convection / movement subsurface, it was moving quickly but smooth surface. No hot break. It really should be hotter, I still think, but the final result was very good beer, no DMS, hops well integrated, maybe not as clear as prior beers (not an issue for me) but flavor is excellent.
Power bill was reasonable for the longer boil, so I am fine with continuing down this road with the electric kettle and leaving the old propane turkey frier as a backup. It may make my boils longer quite a bit longer than they had been on the propane burner, but no big deal. Maybe not quite as crystal clear but I'm ok with that. It's delicious beer, bottom line. I guess reaching actual boil isn't that important if you're close enough.
Relaxing, not worrying [anymore], having a very tasty homebrew.