I don't think a survey is needed either. If people think something about the way you smell they will let you know. No need for a survey just look at their body language and what not.
At the end if you think and feel you smell better go with that. It's more about what you think not anyone else. If you have the confidence you need to live life than what else matters. I know finding out if you do or not seems really important but in reality it's what you think that matters.