For cherries a longer wait will often give you better fruit. Look for the darker colored fruits, those are further along, and keep testing a few of the darkest ones until they are perfectly ripe. Now you know the picking point, and wait on the rest until they get to that color.

My White Gold is ripening now, they are all sweet and edible but they have a ways to go before they are really good. In a yellow cherry you look for how yellow vs white the background is but otherwise its the same idea as with red cherries.

Scott