I don't like the tone of these posts at all.
But, here's my opinion and one that anger in other posts might have distracted from being heard...
MD/PhD is a long road, but not one that is necessary to achieve any goal in life. There is nothing that one wants to do in life that requires both an MD and PhD.
Therefore, it might be best think about your ultimate career goal and figure out which degree will best help you achieve that goal. It would allow you to be at that point earlier than the MD/PhD route and enjoy more time doing what you want.
For example, if you envision your life as a physician with clinical research interests, you need the MD. The PhD is great experience for training reasons, but a goal that could be accomplished with a post-residency K award as an alternative. Or, if your more interested in research with a clinical perspective, go to graduate school and do research in a group consisting of MD colleagues.
Like anything in life, it really is a long road with no guarantees of success. It seems like you have your mind made up but be prepared to be open to alternative paths.
I am just finishing and will be 31 years old (but then again, I am female so it may be a little different), and I feel strange with some attendings being younger than me. And there was a time when I felt very sad about my choice because a lot of my friends had gone ahead with their lives while I was a perpetual student with "no real responsibility." But 8 years has taught me to ignore the chatter and just do what I love so I don't regret it one bit. I needed those 8 years to be who I am now.
Good Luck
