It's a typical Ted Reed puff piece, and McAdoo seems to be quoted by him quite often. Perhaps that's because most other analysts are too busy to pay attention to Ted Reed, and other reporters don't call McAdoo...
Comparing MSP-LSE (119 miles) to ORD-LSE (215 miles) sounds great, but ignores the scope clause that used to be in place and drove the equipment purchases including the 44 Barbie jets. The economics of operating into a close-in fortress like MSP will usually be different than into a more distant competitive hub.
Whining about LHR service being on a 777? They're choosing to offer up a comparable product to that of their JV partner, and that includes the F cabin, and from what I've seen, they're not going out empty in the premium cabins. I also suspect the operating costs of the more fuel efficient 777 wind up being less than what a 763 would be, not to mention the revenue generating potential of having twice the cargo lift...
Those are just the highlights. I tend to take anything Bob McAdoo says about AMR with a brick of salt. He's been out of work twice because of AA -- first when he was a SVP at PeoplExpress, and again with Vanguard. Sometimes he's right, but he's far from a neutral observer.