We had intended to, but in the end did not. The way they run the tour, we kept either switching off from one guide to another, or being together as one large group with all guides. We were 36 people touring with 6 guides and 1 tour leader. One guide led us to Brown Derby in the morning, another led us to Darth's Mall, another took us around to 3 attractions, all guides took us to lunch, then two groups ended up together with two other guides for another portion, etc. Not sure if any other groups really just stayed with one guide, but our party didn't -- just didn't work out that way.
If we had one guide all the way through, I would have tipped for sure. We thought about giving a small amount to each of the guides at the end of the tour, but when we made our way to the 3:15 show for seating (which we thought would be our opportunity to do so), we only saw one of the 6 guides -- the others had left.
I'm big on tipping, so it made me sad not to. In the end, I opted to instead use some of our free time from 4pm to 8pm to go to Guest Relations at the front of the park to leave glowing, specific feedback about each guide. Hope that translates into something good for each of them.
ETA: I'll also add specific feedback on each guide in any survey I receive... we always seem to get a couple after each trip.