All depends on the day, conditions and where you are sitting. Inside the woods with no snow on the ground your lucky to get and extra 10-15 min before/after due to darkness. Open field no snow that might stretch out to 20 min. Now you add snow in the mix and there is a good chance that you can utilize the full 30 min before and after.
That's just my experience anyways.
I don't mind the change at all and think it makes since and aligns with every other state in the country.