This has become my biggest pet peeve, when mirror is so distorted that you reflection looks like a completely different person. I know that one of the full length mirrors in my house is a "skinny mirror" and so I always do an outfit check on a different mirror before I leave the house. It throws off my ability to do outfit pictures in the mirror because I know the pics don't come out representing real life. I took a few pictures last week and had to run downstairs and have my daughter take a couple more because I knew the mirror was throwing off the proportions.
Then, I was at a friend's house for thanksgiving and holy moly! Her mirror took a good 40 lbs off of me! You might as well not have a full length mirror if it's going to distort so much.
The part where it really starts to bother me is when stores have trick mirrors. I really think it's intentional. It's part of the reason that some items look so good in the store and not so great once you get home. Old Navy and Loft are the worst offenders. I have to check myself out in my own clothes to see if there's a distortion and then take that into account when I judge the clothes I'm trying on.
Sorry for the rambling rant this morning. Has anyone else noticed this?