PA-PLAYA I agree that, for me at least, the driver swing and iron swing are different. Maybe not completely but definitely not the same. In most rounds I'll hit my irons decently and struggle with the driver and 3 wood. At times I just pound the driver long and straight the whole round, but then I can't hit an iron to save my life. On super rare instances, not a full round of course, I can hit both. When that happens I usually have this feeling of swinging the driver much flatter than the irons.
The real problem is that when I find a swing key that works, it's lifespan is limited. It only works for so long. Probably because I have long stretches where I don't swing a club. Winter is usually pretty long here in New England. Even in the summer, I may not swing a club for 2 weeks due to work and family commitments. It only takes a couple of days to lose it. I drove the ball great in a round on 10/20, but was horrible yesterday. I just couldn't find that feeling I had a week earlier.