Rebuild your f'ing flippers...!
I'd expect that the flippers are fine, and the machines are just set up slightly differently than you're used to. A lot of people have told me that my machines need flipper rebuilds -- no, they don't. They are set up at a super high pitch, and I don't upgrade my coils to make every shot. I'd rather make the game more difficult. I know a lot of JD owners that have high scores in the 2.whatever billions, mine is in the 200 millions, and that is after being in the MGC tournament for a couple years with really great players taking it on. That's how I like it -- the flippers are just fine.
It could also be a power issue, as I have seen at some shows. If machines don't get full power, they can play a little weaker. It is an *expensive* issue to fix if you are going to do that, although knowing the Michigan show, it isn't a power issue -- it's that they set up their games like I do
Having said that, I think that if you're going to a show, you're going to hang out and play games with others. If you're doing that, no matter what -- the game plays the same for everyone. If you and me take each other on in an EM or an ACDC LE, the game is ultimately going to play the same for both of us.
If you drag the machine home, you can set it up and dial it in exactly how you want it to be. Easier, with better electric, or whatever. But enjoy the *people* at the show first. It's way more fun!
Wish I could be there!!