Instead of those Powerpoles, we use quick disconnects like these:
http://www.sonicelectronix.com/item_...100+Pack-.html
http://www.sonicelectronix.com/item_...100+Pack-.html
http://www.sonicelectronix.com/item_...100+Pack-.html
http://www.sonicelectronix.com/item_...100+Pack-.html
When crimped and used properly, they're very easy to use. We also put these:
http://www.tycoelectronics.com/catal...75,2276&N=2 0
on our Victors (a mentor picked some up at a local electronics store; those aren't the ones we bought, but they resemble what we used closely). Many of the Victors have spade tongue terminals on them (what Al suggested), but that was because that wiring was done early on, and we only realized the benefits of quick disconnects late in the season.
Spade tongues are useful, especially because the screw does not have to come all the way out to put it in, but what I've found has happened is that these terminals have popped out. The reason is that the force holding the terminal down actually pushes the tongs of the tongue apart; consequently, the terminal just pops out. It happened enough times that we went over every single Victor wired with a spade tongue and used some pliers to close the tongs that looked like were ready to pop.