The people posting here must aren't thinking too clearly. Yahoo is Yahoo, Google is Google, and they both aren't going to change. Don't expect Yahoo to give up all it has to downgrade itself to a Google, and don't expect Google to add more things unless they find their market share is going down (well, more than the very small amount it has).
So, both aren't going to throw away their advantages. To me, using Google as a homepage is borderline retarded (I use Excite), because there's nothing on it, and if I want to do a search, I have a Google search on the top right of Opera.
Yahoo is just playing to its strength. It's advertising where it is stronger, and trying to make people believe it's format is better. That's why you create ads. Neither is better, some people prefer each. You try to show your format in the best possible light.
I think them saying Google is a place you go to, to leave, is pretty funny. It's true, but that doesn't make it useless.
With the new changes, I've been using Cuil and Bing anyway. I can say, you don't miss Google when you stop using it. It's not something you really feel pain when you leave.