According to my mom, I had been mispronouncing R and L as far back as age 2, and there wasn't any period before the expander was removed when I did pronounce it

According to my mom, I had been mispronouncing R and L as far back as age 2, and there wasn't any period before the expander was removed when I did pronounce it correctly. So my experience exactly matches that of the above internet citation regarding pronunciation, speech therapy, and expander removal.