No -- it wasn't lighting at all.
Turns out the new igniter was bad, see image below with strange white spots at the top. It did something weird when it was first installed -- sparked like it was burning off something -- which the tech noted, but then it smoothed out, and worked fine for about 2 weeks.
Until yesterday, with a 10-egg frittata ready for some hear, no dice.
Bluestar is sending me another new igniter. Squabble over the labor -- I see the problem as about the warranty of the latest igniter, and not any error on the part of the tech. So tech needs to be paid by them for the replacement work.
I'm confident we'll work it out.
But in the meantime, it's back to Stovetop Cooking.