I'll allow for some gusts, and I'll allow for the odd fall away or luff up
when the helm admires the view. Even allowing for these factors (which I
agree are typical), I'd still like to hear how much weather helm is typical
in an 11mph wind, such that a 3 mile beat, followed by a 3 mile run, will
take you back to your start point.

If you'll allow that, then your point is moot.
Sorry. He could have been on a run.

RB