She clearly has a voice and she's clearly young and needs a little coaching - strangely enough to sing simpler, without vocal jewelery - she does a lot of beyoncesque diaphragm walking across the range every time she finishes phrase, which is good if you want to be casted to Idol via 10 second chorus, but not so good when you perform 90 minutes in a row - sometimes phrase just needs to be finished with huge note and maybe a bit of Whitneyish vibrato rather than Beyonce like "horse neighing".
But anyone who says she's average and nothing special simply don't know what they're talking about. She's a league above just about any X-Factor contestant and you'd be pressed hard to find such "miss average" in any of the British schools. I hate the music type she sings and was never a fan of start-stop heart arythmia/shaky diaphragm soulish singing but anyone who can sing like that, in one take, without editing, sitting on her bed with feet up deserves all credit and instant attention of proper industry specialists.