It's impossible to say that she was definately Maria. There's no proof that anyone survived. It would have been very difficult for someone to survive, as they were all crammed in a corner, and being shot at, at such a close range, no one could have escaped the bullets. You musn't believe everything you hear. You never know who's lying, and who's not.
My own idea is that someone survived (well...You already know my. I'm completely crazy!

) but I saw this TV Show and didn't be convinced a bit by it. I must agree that she ressembles A LOT Maria Nicolaievna (Saying she was not like her a bit doesn't help and it is not true), but this doesn't make her Maria. Perhaps she was, but the TV Show didn't said a single thing that I could consider an info. I even hear that they performed a DNA test, having different results from the skull and from the leg, what I found VERY odd. One of them didn't match the Romanovs, and the other was considered contaminated or something like this...
I would like to know more things about this claimant, for example: Did she have childhood memories as Maria Nicolaievna? Did she passed other test, like calligraphic ones, medical ones, etc? If you know more things about this issue, please, post them.
RealAnastasia.