Hello fellow Albertan,
Was just there in May for 3 weeks. Had a car for some of the time and relied on the shuttles for the rest of the time.
The shuttles are efficient compared to other off-site places I've stayed. The 1st in the morning goes to Magic Kingdom and Animal Kingdom (I believe 7:45). Drops you at the TTC and then goes the Animal Kingdom. Of course, if you want to go to Epcot or MGM (or anywhere else) you just use Disney transportation from there. The next one leaves at 8:50 for Epcot and MGM (drops you off in parking lots for each park). From then on, the shutlles leave every hour, maybe? They come back in the afternoon up until an hour after each park closes. Pickups are in the same number bus stall - clearly marked with big numbers on the ground - for all theme park areas (ex; Epcot stall 32 bus parking lot, MGM same number, TTC same, Animal Kingdom same, etc.). If ever you are stuck in the World and missed your shuttle, just get back to Downtown Disney Marketplace and take a cab from there ($5.50 with the meter running - the cabbies bartar down there and will usually quote you a $10 fare from DTD Marketplace to Comfort Inn, just tell them to turn on the meter) or take a good 20 minute walk back to the hotel.
The shuttle to Sea World and Universal is good as well. Not as many pickups or dropoffs, but what do you expect? Just 1 route for both areas.
I'd call for the schedule...they may differ during the year and estimated vacancy.
We didn't have one problem with the shuttles or the drivers...Robert was our favourite. Drivers were friendly and helpful - certainly not taking their Disney super happy magic pills (I was a cast member), but pleasant and helpful. Yes, they do leave signs up to tip them...but that is because they can; Disney doesn't allow tipping outside of food service. We were never pressured to tip nor made to feel bad if we didn't; either way from any driver. Big deal...what's a $ (okay, a $1.30 in CDN, but still) with Disney movies playing on the televisions anyway? They smiled and thanked us if we did leave one.
Pretty good service for something that is arguably "free".