Other then the work time, and 5 min. is fast, one of the thoughts behind the longer setting epoxies is that it absorbs into the wood for a better bond the longer it takes to cure. It's one of those deep thinking things and you have to make your own call on it??
I have used 5, 15, 30, 45 and 60 minute epoxy and never noticed it soaking into the wood. I once used a finishing epoxy on a wing and it worked, that has about a 15 hour set up time and had me worried for a long time, it seemed a little brittle to me but the wing stuck together until I did a bad thing, even then the center section held.