User blog comment:Sargenttacos115/Natsu and Gajeel age Theory/@comment-122.49.170.118-20140620170833/@comment-122.49.159.37-20140623090913

Except I'm not talking about the time skip at all. The time skip is completely irrelevant. During the 7 years none of the main cast age at all, which means they are technically still the same age they were before they left for Tenrou Island. I am referring to the fact that Natsu appears to be roughly the same age as Gray due to their appearance in flashbacks to their childhood. Therefore Rogue and Sting can easily be 19 to Natsu's 18. Rouge and Sting had 7 years to grow up that Natsu didn't. It just means that Rogue and Sting were 13 when they disappeared from Tenrou, not really that much of a stretch since the dragons had already been gone for 7 years before the time skip.

Also, Natsu is a 1st Generation Dragon Slayer, not a 2nd. Laxus and Cobra are 2nd Generation.