Singles is worth more points overall, but doubles really sets the tone in college. Whoever wins the last doubles match certainly has some momentum leading to singles, even if you are down 1-2. Sweeping doubles really makes the other team feel out of it. For this reason, where I coach, Drew University, we emphasize doubles. I feel doubles play translates more to singles rather than the other way.
In DI singles is way more important. In my four years I can only think of maybe 5-6 matches where the outcome was decided by the doubles point. I can't see anyone getting a lot playing time as purely a doubles specialist, they need to be able to hold their own in singles AND they would have to be significantly better at doubles than one of the top 6/7 singles guys to justify bringing an extra guy on the road.
It certainly seems as though doubles is more important in a college match than singles is. At least in terms of having the momentum, and having a better chance at winning singles...
Doubles in important but I think its a mistake to over-estimate the value of 1 point verses 6 singles points. Sure it helps with momentum but lets be real, momentum is not real its perceived.
Look at last nights USC vs. UT final. UT won the doubles, had two doubles specialist in the line up which means that 2 of the starting singles guys are rested and it still did not work. Also, I know another mid-major D1 team that played 2 doubles specialist most matches and they took doubles points off a number of ranked teams only to lose the singles.
I'm not trying to burst your bubble but rather encourage you to take a more balanced approach to how your view college singles and doubles. If you go into college thinking your a doubles only player you may be limiting your chances.
there are certainly some smaller schools that you could look into.. you might play higher in dubbs lineup and low in the singles.
Assuming that I might get to play college tennis (doubtful) I would see myself as a doubles specialist. I'm not a terrible singles player, don't get me wrong. My playing style is just better suited for doubles. When it comes time for me to go to college (I will have two more years) if I am good enough to play college tennis, I would definately look into a place that would value me as a doubles specialist...