Apologies for taking so long to get back here, and thanks for the replies.
This happens on almost everything we cut, but I've attached a single eps that is a prime example of this issue. There are four shapes in the file; a square, a circle, an oval, and a round-cornered hexagon. They are all very clean shapes with as few nodes as possible. (The "L" shape I mentioned in the first post only has 7 nodes.) Even the hex in the attached file only has 12 nodes total. The straight lines cut very fast, but any time the blade gets to a curve, the speed drops to somewhere around 1 inch per second, moving in rapid jerking motions. Thanks for the help!
119395 AMP_Hood-Stickers V2.eps