We actually can't get over the difference.
Maggie Wheeler was on 'This Morning' yesterday and everyone was shocked to hear that she sounds nothing like the character she played on 'Friends'. Thankfully, Wheeler was 'happy' to give everyone a taste of Janice on live TV, despite the fact that she probably gets asked to perform Janice's trademark 'Oh. My. God.' every day.
According to Wheeler, the laugh came "happened organically, because I needed to find a way to laugh, because Matthew Perry is so funny," she told Ruth Langsford and Eamonn Holmes and had loads of insider gossip on the show.
Add this to the pile of actors who sound nothing like the characters they play, started by Fran Drescher from 'The Nanny' and continued by many to this day.