Why just NY or Boston? Chances are if UK bands come to US, they come there.
They completely miss the south-east. I can't blame them though. The audience are probably too small.
Personally if I would travel to do a US tour, I would hope for California and Pacific North-west.
You could always travel to Europe to see them. That's what I do but it's probably easier because I permanently travel.
Ah - But they did come to the south-east as Justin and Friends. I saw them in Nashville and Lexington or Louisville. They also made it to Atlanta. Unfortunately, most of the audience in the shows I saw was the family that traveled over and followed them around. Tommy said that they were glad they came, but don't expect them back any time soon, and if we wanted to see them again, we'd need to travel to at least Chicago. So, I made damn sure I went to the NY shows for the 30th.