I'm not sure where I stand on this. Like so many things, I think it comes back to whether you view Paintball as fitting the traditional sports model or the Extreme Sports model. If you go trad then, by and large, local is the way to go (although there are notable exceptions - road cycling breeds fierce rivalries and loyalties amongst teams and supporters that have little to do with regionality - or even nationality in a lot of instances).
The extreme sports model tends to be based on factory teams, which are based around companies involved in the industry (great irony, that the so-called counter culture sports are the most overtly corporate...but I digress), and with Paintball being more product-driven than pretty much every other extreme sport around, you could reasonably expect factory teams to be the way forward. Dye Ironmen or LA Ironmen? JT Dynasty or San Diego Dynasty? Will it make that much difference? I think affiliations are made just as easily if you like the way someone plays/gear they use/use the same gear as you/way they look/whatever, than if they're local.
With the massive increase in media the local draw is not what it once was...go into any street in pretty much any town centre in the UK and odds are you'll see more kids in Man United shirts than anything else. If you can watch every single game on TV and you can't afford/have no desire to go to a match yourself, then team choice becomes a matter of personal preference rather than regional loyalties.