You guys are silly. Starting off in 2nd gear is fine, especially if you have 3.73 gears.
I posted on another thread the gearing and max mph for each gear in our Mustangs compared to the Camaro and Corvette, and each of those cars first gear gets them will into the 50-60mph zone for 1st gear. In addition, the Camaro weighs several hundreds pounds more than the Mustang. 1st gear on a 3.73 Mustang will only get you 40mph at 6800rpm, and 2nd is only good for 60mph.
You got to remember that 5th gear is the new 4th gear (1:1 ratio) in the 2011+ 6MT's, so we gained an extra street gear, not a highway gear as in the Camaro or Corvette, which has 5th and 6th gear ratio's as highway gears only, with 6th gear being useless unless on the highway with a (0.5:1 ratio) where as we can use 6th gear at 35mph with 3.73's.
The new 5.0 motors turn high rpm's, so we have a very wide powerband to use. There is plenty of torque available to use 2nd gear all day long as a starter gear, unless you need to take off with caution for low speed parking lot driving, or full power launches, in which case 1st gear works best.
You are not going to ruin your clutch from the low rpm clutch slip to get the car moving, which is not excessive at all.
2015 Mustang GT PP 401A Black | Roush Supercharger