Observing all tires mentioned above on two 3,000 mile tours. All these tires will have flats. Just some have fewer. The Michelin seemed to have fewer than most with Continental close behind.
Bontrager may have fine qualities. Long lasting life is not one of them. The Bontrager Hard Case tire lasted less than 1,000 miles as were as the Michelin and Continental lasted the whole tour.
When I say Bontrager do not last I mean that the rubber starts flaking off and frequent flats occur.
BTW, I had the same experience with the Bontrager Race Lite tire as well as the standard Schwalbe Road tire. My complaints to the LBS were answered with: Yeah, they are good for racing but not long distance touring. Our touring was no load touring at 120 miles/day.