Times, Dates, Food Preferences, all will factor in. However, bicker is right about the GF Cafe, especially at odd times. Be prepared though, because getting seated does not mean getting your food at GFC, and it can be a long wait.
I think you original question was about having and ADR and then needing to wait a long time after going to the podium. Again, Times and Dates will matter, but I'll try to help a little. Always check in before your time, otherwise, you may get shuffled back.
Teppanyaki comes to mind first. They are very efficient and have always seated us before our ADR time. V&A's seats you immediately upon arrival.
At CRT, you wait in line for a pic with Cindy, so the wait isn't as bad. Plus, they ring the bells and announce to the lords and ladies of the castle that they are seating your "Royal" family!
California Grill will NOT let you check in early for a later time. They actually told us to wait and come back close to our ADR to check in!
Whispering Canyon can get overbooked and take a while, as can 50's Prime Time Cafe. Mama Melrose is really long when the park is full. Chef Mickey's is pretty bad unless you have an early time (you need to wait in line just to check in - "excuse me, I have an ADR and I just want to check in" --- "so do all of these other people").