Firmly gripping the steering wheel with two hands-especially granny style-isn't necessary. Dodged many t-bonings with a looser, 9-3 grip that allows me to toss the wheel fast. I also sit as close to the wheel as comfortably possible (less arm and leg travel on the pedals, quicker reaction time.)
Also if you drive stick in the city, you are running through 3 gears at every light, dropping a gear when it slows down a bit much, sometimes two. Toss in hill starts, drivers on your ass on hills (gotta ebrake them because you don't have ANY room for potential roll back). Can't be on the wheel with just two hands all the time. On the flip side I would say that I am 100x A better driver now, than I was in an automatic. Auto's are like cars with training wheels, you just pedal and you're good lol.