Are UK Imports a fad here in America?.

Ok. Duffy, Adele, and Amy Winehouse are all similar in a few ways.
*They're from the UK
*They're all women (obviously)
*They're all 'alternative', soul, throwback singers
*They were all released to critical acclaim.

I feel like every few years we have to have a new hot import singer with a 'fresh voice' (as vh1 likes to call them) and a 'unique style' hit the States. Don't get me wrong I love all three of these artists, but it's a little pathetic that it takes one sometimes purposely sugary song to make them big on radio here. Now some people will say, they have talent, so why should it matter how they became popular? Well, that's true, but I think it's dumb that they either have to wait an album or two to even get the time of day over here, or rely on an extremely late album re-release for some shine. I'm sure within the next two years, another girl (or guy hopefully; James Blunt or Daniel Powter anyone?) will come along and sweep us away with some amazing song. Then they'll spend a year or so plastered across magazines with the same title "America's hottest import", (or something similar) and be the go-to artist for all people who want to seem 'edgy' until the cycle starts again and they're back to only seeing popularity overseas.
But hey, I enjoy the music, so maybe the cycle is for gullible listeners like me who don't really take the time to search outside the Beyonce/Rihanna bubble we live in. And hearing the song on a cheesy reality show (The Hills, Gossip Girl, etc) doesn't count.