One thing that stands out is that this rider, unlike many, runs 110 miles per day in an area that's known to get quite warm in the summer. Most motorcyclists do not ride anywhere near that much (witness most of the low-miles 919s around here) and therefore if this is a problem it won't show up until the more pavement pounding among them start racking up serious summer mileage in similar conditions.
Semi-related, since we're talking tires: There recently has been a problem with Avon Storm Ultra rear tires delaminating and disintegrating, also under hot conditions, often enough - but that's finally been traced to the tire being placed on heavy bikes like the ST1300 when it isn't actually rated for their weight. When I was buying tires for the 919 last, they hadn't quite gotten the cause resolved so I got the last of the Storm STs instead. I'll probably get Storm Ultras next time (I'm pleased with these Avons,) now that it turns out to have been a "didn't read the label" problem as opposed to an actual defect.
However... I'm thinking that neither the weight or the instructions will be the problem with these Michelins, so if you have PR3s and especially if you ride in a warm-to-hot part of the world, I suggest you use caution and inspect your tires very, very frequently until this is resolved.