Pronunciations of /r/

[Bartek Plichta]

Hello,

I am wondering what is known about the pronunciations of /r/ in r-full
varieties of American English. I would appreciate any information -
anecdotal or otherwise. Is /r/ pronounced differently in different regions
of the United States? How about ethnic varieties? As a non-native speaker
of English who just moved to Minnesota from Michigan, I seem to perceive
the Minnesota /r/ as somewhat different.

Thank you very much in advance!

Bartek Plichta

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Bartek Plichta
http://bartus.org