I can't understand why this keeps coming up, and why the title is "may switch".
Go back and read:
http://www.ft.com/cms/s/b3cc3b36-f29...b5df10621.html
It's when, not if BA switches.
What doesn't make sense is the CEO of Dallas Airport making an announcement in London just about this - it's such old news now. Of course, as has been pointed out in AAnother place, Wimbeldon is on this week.