When you're at a restaurant or in the company of people you need to impress, by all means use the fork. Work methodically, stab individual leafs of lettuce individually, nudge chopped carrots into the base of the fork.
But when it's just you eating with the people you see every day, drop all pretenses and just grab it with your hands. You'll get through it faster and enjoy it a heck of a lot more because the effort-to-taste ratio will be equalized.
This I learned from Luke after I took his fork away because he kept banging it on the table.