Sorry Lefty..!! Getting back to the TOPIC, personally I do both. What I mean is that I'm a feel bowler at my release, but I'm a target bowler with my eyes and feet.
If I make a move on the lane, I will use some sort of system with my moves, i.e. 2 and 1 with my feet and eyes, 3 and 1 or whatever.
But, instead of moving, to get better carry, I will change the feel of my release. Meaning I will maybe hit the ball harder, roll it more end over end, roll it sooner into the lane, turn it more, ect...ect...
On an oily lane, this feel at release is most important and my best weapon.
On a dry lane, bowlers can release the ball anyway they want, as long as they throw it into the dry, so lining up with your feet is most important. =:^D