But they did announce.
It's under 7. So we know it's at most 6:59, which is essentially at least tied with the 918's 6:57. Anything within 3seconds is basically a dead wash. But it could also be 6:47, or 6:37, as some of the rumors have suggested.
So from a marketing standpoint, it's kind of brilliant and moronic all at once. Brilliant because it's mysterious and "at least as good as the 918" or potentially faster. It gives it a "Im at the top of the heap, yet above it all" vibe.
It's moronic puffery that apparently McLaren made some assertions on times on the ring (being below 7m) but now are bowing out on details, which looks like wimping out.
I hear what you guys are saying about it being a good thing to deprecate the industry's fixation with the 'ring times. Nevertheless, the best marketing McLaren ever does is when they under promise, and over deliver, and the above doesn't follow that pattern.