Ha Ha! I hope I'm not insulting you and I appollagise if I do, but thats FUNNY!,
Do you suppose that they possibly were'nt allied. Maybee you just had a very valuble planet to start with.
I have to agree though also, it seems AI ally alot quicker. In some ways I like it, it does make it more challenging, but to be creamed straight away without being able to do anything about it wouldn't be much fun. Not that its happened to me yet.