I'm guessing FL doesn't tax Social Security and/or 401Ks while other states do.
However to the point you quoted, it is accurate (with the nuances XLIX pointed out about reciprocity)
Last year I worked days in NYC, NJ (Parsippany) and Philly and paid State Income tax in all three, plus North Carolina, where I live.
EDIT TO ADD - Ironically, my dad just retired and said he was reading about states where retirement will stretch the longest. MS had the highest score. I had to remind him he doesn't have to move back to the third world (after spending 13 years in Indonesia and China) to enjoy retirement.