This also makes me reiterate my curiosity about why you even want to bother to learn to play traditional. I can understand a trad player wanting to learn matched, but not vice versa.
Well, as we all know, a 'good' reason is always arguable. So with that, my reason for switching to traditional to matched a few years ago, was because I made the decision to 'start from scratch'. I was at a point in my playing career where I just wasn't happy with my technique and finally became honest with myself that my stick control was horrendous.
Thus, I sought out a teacher and explained that I wanted to start all over again as if I'd never played before. With that, I was presented with the question of "what grip do you want to use?" Well, I chose traditional because this was also part of my 'starting over' mentality of doing it 'right'.
Well, to become a 'real drummer' this is what I felt I needed to do. It's as simple as that. Besides, it was something I thought hard about for a while and also took into consideration what kind of grip some of the drummers I admired used (most were traditional grip players or used both). In addition, I considered myself a drumming failure, which at the time included matched grip. Finally, I wanted to study brushes and my teacher did recommend using traditional, which I had also had not so very good results with my brush playing matched grip previously.
So for me, I guess it was all a mental thing and I don't really have any other reason to justify switching except out of personal preference.
Bottom line for me currently, is that matched is still preferable for rock or beat-oriented applications and traditional is preferred for more technical and dynamic applications. Fortunately, like Mr. A mentioned, I do have a regular rock gig two to three times a week where I do use matched. My fills are terrible, but the beats are consistent. I have a jazz gig (100% brushes and hand drumming) as well where I use traditional. Then, when I practice, I practice traditional.
In light of what's been stated in this thread and what B-man stated in his last post, it seems that drummers who use both probably have a primary grip they prefer/practice with and then simply use the secondary/other grip(s) 'on the job' as it applies. What I can do from now on, is rather than practice
everything with both grips, start practicing those things that I'm currently using matched for (the grooves and those associated fills).
This just gives me an even greater respect for these guys who use both grips well. I could never imagine having THAT much talent.