I'm with you on this subject, but what that makeover lady said is true -- I have definitely not been taken seriously because I don't look the part. It's been a huge problem for me. When I was in my 20s I could get away with it - as a 30something year old, I can't.
If someone offered to do a makeover on me at this point, I would accept - at least I would have one outfit I could wear to business meetings!