Here's some exciting news.

Apparently, being from a low SES and then becoming highly achieving causes you severe physical stress.

"The authors found that the socioeconomically at-risk kids who reported low levels of depression, conduct problems, and substance abuse and who were rated as highly competent by their teachers in fact showed the greatest signs of physical distress. In other words, the more kids seem to be fighting their way to success, the more their health seems to suffer."

http://www.psychologytoday.com/blog/brainstorm/201306/the-hidden-costs-resilience

It's psychology today so I have no idea whether it's actually good science.