Wait a second, wait a second ....
There's a lot of misinformed, prejudiced stuff being thrown around here regarding DME.
First of all, the "bring a book" comment, if it wasn't meant as a joke, is just complete B.S. Disney reports the average time from plane exit to resort drop-off as 70 minutes.
And the 3 hour comment, about using DME before it was DME ... well, it wasn't DME!!! Why scare people about an old, defunct system when they're asking about a new system??? I mean, it used to take my parents three days to drive to Florida from Philadelphia, but then the U.S. government invented interstate highways, so what good is it to quote times from when there were no interstates???
The first time I used DME was the 4th day it was available. About 9:30 a.m. on Mothers Day, 63 minutes from plane exit to resort (I timed it -- DME was brand new and members of a message board were waiting for my report!)
I used DME again a few months ago. We landed around 10:00 p.m. on a Saturday. From plane exit to resort drop-off it was 56 minutes. 56. Less than one hour. On a late-night flight.
They don't wait for buses to fill up. The procedure (which, of course, might not be followed by every single driver every single time) is that once the first guest boards the bus, they are to wait no more than 15 minutes before shoving off.
Each bus will stop at no more than 4 resorts. Four is pretty rare, three is the most common.
If you put the special DME tags on your luggage, you can skip baggage claim. Your bags will be delivered to the inside of your resort room within about 3 hours of when you arrive at your resort. Take a carry-on packed with your immediate needs (which is a smart way to fly anywhere, just in case the AIRLINE delays your luggage). You don't need to wait in your room for your bags. They will be delivered whether you're in there or not. The Bell Services CMs receive a payment from Disney for each guest's bags, in exchange for the fact that the guests are often not present in the room to give tips.
The DME luggage tags have barcodes. These barcodes are scanned 5 separate times in the delivery process (starting "behind the scenes" at the airport), and the delivery trucks are tracked by GPS -- Disney knows where your bags are at all times.
Anyone who has any more questions about DME ... there is a WEALTH of info about it on the Transportation forum.