I find it hard to believe that the "I'm moving to commieland over Obongo taking my guns" style Boomers are as sincere as the passportbros moving to SEA to find a wife. One group actually does this, the other doesn't.
There's a handful of people here - myself included - who regularly talk about details of their plans to leave. Even if most of that 50% don't have resources to actually pack up and leave, it still represents a future exodus out of the US comparable to what happens in India.