My wife is dyslexic. She used to have a hard time with phonemes and syllables containing M/P, T/D, F/V, P/B. Please note that she's a native French speaker, and language type (opaque vs transparent) seems to have an influence on dyslexia. She managed to reach university by herself, but was hitting more and more road blocks especially as she considered a Law cursus. She reached a speech&language therapist ("orthophoniste", don't know how developed it is over there, but it's quite a well-known field here in France) which trained her at working around her difficulties. She's now on a successful path towards a masters degree in Law, and you probably know how much words are of much importance in that field, so I guess it's a total win.

SLTs actually use those associations to quickly and accurately diagnose dyslexia, so sorry, I have no reference to give to you. It may look like anecdotal evidence, but I get that straight from the horse's mouth.

OK, thank you. My high school math teacher was dyslexic but as he told it, it was an issue with letter rotation, flipping, and swapping, which is what I've heard from other sources (including local SLTs). Maybe that's something that depends on native language or the type of dyslexia you have.