Ha! I'm not nearly as fanatical as those people - probably a real heretic by their standards. (although I have exactly the same shirt as that guy in the pic you posted..)
Of all the different music I love, the focus probably is the 1950's, as far as blues and Rock and Roll go anyway, but then I like 60's country more than a lot of 50's country, and I love Dylan and Jimi Hendrix too, and pre-war folk and blues..and the Ramones...so I'm not that much of a Rockabilly scenester.
Have seen an awful lot of Rockabilly scene with the band I used to have though - from Norway all the way down to Spain, and all places in between..