Kinda.
The benefit of a red dot sight is in the fact that you can sight with just a single point (the red dot) versus two points (front and rear iron sights). Red dots allow the shooter to aim MUCH quicker than lining up irons, allow him/her to make hits faster. They also have the added benefit of being correct regardless of the shooter's head position or cheekweld, making shots from odd positions easier.
If you've never shot something to compare irons vs. Aimpoint, you really should-- its like magic.