User blog comment:IamJakuhoRaikoben/Chapter 410: Memento Mori, Review./@comment-4449950-20141123060745/@comment-4829046-20141124114054

Just to clarify on one point, here's the section from Erza's article -

Telekinesis (テレキネシス Terekineshisu): Erza is also a skilled user of Telekinesis. The first time she used this Magic, however, was accidental. When she was a child in the Tower of Heaven she used this Magic to levitate discarded weapons from the ground and launch them at her enemies, something which she did inadvertently, due to the shock caused by Rob's death.[25] Erza's most common use of Telekinesis comes with her Sword Magic, in which she can perform different attacks by controlling her swords remotely.

So yeah... totally different from Gray's case. Gray is confident in his abilities and it using them fluidly for the most part. Erza only used it at that moment and then stuck to just regular swordsmanship. Cana and Wendy were also confident in their newly acquired abilities, but failed. I know a spell and magic are different, but the working of the mind and the body are still similar in terms of dealing with and adapting to a whole new ability. Natsu has shown this unbelievable adaptive quality, but this comes from his recklessness. Gray on the other hand, thought things through more than Natsu so him doing a Natsu is sorta the problem many people have.