Crank Length (7)

I am looking for crank arm length stories and opinions. I am a large rider, tall and fat if you will. 6’2’ x 250lbs. I have always thought I could get more out of my bike with a longer crank and when I brought it up at the shop I was scoffed at. I have read an article by Zinn touting longer crank arms for tall riders and it really made sense. What do you think?

wow, FYI posted this the exact time as Mr.200 mm. Still would like more stories on this. Read the story about crank are length on Velo News.