CSR has quick rides to all the parks and is the most central to the 3 parks. The Unofficial Guide to Walt Disney World in part three "Selecting your Hotel" it states that the commuting times to the parks from CSR are: 7:30 to MK; 4:00 to Epcot; 4:45 to MGM; and 4:45 to Animal Kingdom! As a comparison from POR it is 12:00 to MK; 8:00 to Epcot; 12:30 to MGM; and 16:15 to AK. See the map below.
http://www.disboards.com/showthread.php?t=1390487
