I also must add I have planted a lot of new trees and bushes, rarely do I have one die. I have a pretty good feel for watering and do it almost daily for first couple weeks then taper off the new 4-6 weeks. After that unless there is a week without rain I leave them alone. Leaves turned brown.

The usual way people kill their cherry trees is not enough water. Especially for extended periods when the weather is hot and dry. That said, you said you have "a pretty good feel for watering", so maybe it's something else.

Dig down about 2 or 3 inches, is the soil moist?

Best way to water fruit trees is to leave the hose on very low (almost dripping) and give the water time to slowly seep down into the soil. 20 minutes to an hour. Once or twice a week.

Yes, cherry trees do require a little bit more water than other fruit trees, especially when the weather is hot and sunny and the air is dry. Making sure the soil is kept moist is most important during the first 6 weeks after the fruit tree has been planted. It needs time to establish its roots.

But cherries don't like standing water either, so excessive water (if the ground is always muddy) can kill them as well. (if the tree's not doing well, you will have a good sense whether it might be because the ground is too dry or too wet)