User blog comment:Conza17/Dragons Gifts and other Stuff/@comment-5268982-20120930110219/@comment-4047931-20120930132701

Thank you for reading the post and you do make some good points but I do have some points to put against them.

So first the idea of Dragon Slayers being as old as dragons and somehow going to the future:
 * First even if the Dragon Slayers were from the same time period as when the Dragon roamed free they couldn't be as old as the ancient beasts.
 * It was never stated that the Dragons were supposed to be extinct because of Acnologia and I do believe some humans said they were still present in the world around X777, Porlyusica even met Grandeeney and she wasn't in Earthland for all that long.
 * Natsu and Gajeel being unable to escape Freed's runes can always be stated to be because of their magic as magic is alive and seeing that they are both Dragon Slayers they have the magic of dragons flowing through them causing the runes to possibly detect the magic. It's still very uncertain either way.
 * Finally living in the past wouldn't necessarily explain the motion sickness as old age modes of transportation like boats and carriages could still have been available at the time.
 * Still the fact that Zeref knows of Natsu hints into the direction that Natsu was from the past but not necessarily Gajeel.

Now looking at the arguments for Dragon Slayers having human age:
 * Well one strong argument for would be the fact that Wendy's age has been given to us showing us she would have been born in X772. The problem here though is that you mainly basing the point against it on a speculation. Still seeing that we have Wendy's age and not Natsu could mean this would not be the case for all the dragon slayers. Again very uncertain though.
 * Anyway Daphne could have just seen a dragon while leaving but either way this does show that dragons still lived around the human age.

Anyway these are all nice points but until we are told the truth there's always going to be a way to argue against them but I would say it would make sense to have Dragon Slayers for the age 4oo years ago and X777.