I'm sure this question has been asked a million times by other n00bs like myself, but I couldn't find it through forum searches nor google ones.

I was told by a member of the support staff at trademybit.com that X11 is the most profitable, X13 is less profitable, and no others are currently profitable. Is this true? I am currently mining X11 coins at trademybit.com, and am only making about 30 cents per day with a Sapphire Radeon 7950 Dual-X. This doesn't seem right to me.