In this area, especially with the market being what it is, it stays within the norm of the 5-6% total commission, split, of course equally to the buyer and the seller agents.
What I tend to do is give a break, should I end up repersenting both sides, not because there is any less work, but because we have it all in house and we know it will go more smoothly and quickly, so I like to help out my clients by giving whatever break I can and leave them happy!
If there is anything further that you need, please feel free to contact me and I would be happy to help you on a more personal level. firstname.lastname@example.org
Best of luck!