Either I travel to WDW too much (or eat too much), or I just have bad luck. Here are some of the waits I've incurred with a PS:
Cindy's for breakfast: 45 min
CP for dinner: 40 min
Chef Mickey's: 40 min
Le Cellier: 1 hour
1900 Park Fare: 45 min
Ohana: 30 min
50's Primetime: 30 min
Cape May Breakfast: 30 min
Now, at some of these places, I've also been seated right away and had no wait. Otherwise, my standard wait is approx 10 minutes.