And I agree- they are dryer than they used to be!!! HOW is that?
I'm now on a search for a scratch MOIST yellow cake recipe!
Maybe swap out some of your butter for vegetable oil - definitely helps the moistness. You might have to play w/ it some to get a ratio you like, but I know it will help. Good luck!
You can also apply a simple syrup (1:1 sugar/water) to moisten it. You can even flavor the syrup.
Also check the oven temperature. Maybe your oven is off.
try this one: http://www.epicurious.com/recipes/food/views/109358 its pretty good. dont overbake and make sure to serve at room temp. because of the butter, it will seem "dry" when chilled. at room temp the cake softens up. its good!
Sylvia Weinstock's classic yellow cake:
Southern Heirloom cake:
You can also replace the oil with applesauce. It adds moisture and makes the cake more healthy. I use natural applesauce with no sugar added.
I had that happen to me, turns out my oven was baking 30 degrees hotter than it was supposed to! We have since bought a new oven a presto! Back to normal