All the Polka styles I've tried sound much different than this. This is what I'm used to hearing. I'd love to have a few styles in this vein, including a good oberek.
http://br.youtube.com/watch?v=s087Bwot8gs&feature=related

and these guys are local...
http://br.youtube.com/watch?v=G6y4vgiijfU&feature=related