At 225* I would expect them to take 12-14 hrs. The 12-14 lb range is my favorite size. I've NEVER had 1 finished in under 12 hrs, and add to that "resting time" it always take 14-16 hrs for a brisket that size when I cook it.
Once you break that 165* mark it will probably only take another 1-2 hrs to be at 190. You're almost there.
Rockin the UDS - every weekend