"And there is nothing wrong with breaking in UK first, there are US bands whose greatest popularity is overseas..."
No, there isn't....however, I think the whole strategy of breaking the White Stripes first in the UK was planned to take maximum advantage of the Jack/Meg White mystery (Are they brother & sister, husband & wife, original & clone?, etc., etc., etc.), which they played up to the hilt - in the land where sleazy tabloids outnumber legit newspapers by about a 10-to-1 margin. (Anybody remember the UK press singlehandedly killing off Jerry Lee Lewis' career when they discovered he married his 12 or 13 year old cousin?)
It was fucking brilliant strategy, and had absolutely nothing to do with their music to boot! Prior to their first UK tour, they were lucky if their first CD was even available at Tower Records. (I first saw it at Reptilian in Baltimore, where Chris showed me it and said -"this is something that might be up your alley - very primitive punk blues from Detroit"). From that beginning to now being challenged by Pete Townshend.....great work if you can get it!!!