Bonnie Raitt can pinpoint exactly how she has impacted her most devoted listeners. And it has little to do with her eight Grammy Award wins between 1990 and 1992, her 2000 induction into the Rock & Roll Hall of Fame, the Lifetime Achievement Grammy she received earlier this month, or her being the first female musician ever honored by Fender with a signature series of Stratocaster electric guitars back in 1995. “The two greatest compliments I get, to this day, are: ‘You are one of the few musicians my mom and I can share’,” Raitt said, her voice tinged with pride. “The other is: ‘I’ve never se…