Traveling time to parks from DTD hotels???

[figment27]

Just wanted to ask if anyone knows approximately how long it takes to get to any of the theme parks while staying at any of the DTD Hotels, especially Courtyard by Marriott, using the complimentary hotel buses?
Figment

 

[A Mickeyfan]

By the time the bus makes it rounds to all the DTD Hotels it could take up to 1/2 an hour or so. That isn't including any wait time for the bus! Sometimes the bus can get VERY crowded too!