I so wish not to believe this, but in ALL my experience, it's true.

Everyone I know who is pretty/attractive has done well overall in life, and advanced at the job. Society and human nature favor the attractive ones. Always had.
I recently had lots of work to correct a palate deformity on the inside of my mouth (which caused my adult teeth to grow in completely out of whack!) and the difference in how people treat me is AMAZING! It is really night and day in the way I am perceived now that have a nicer smile and more symmetry to my face. Especially on the job, where is where I seen the biggest difference.
No doubt in my mind that appearances are the most important thing!