User blog comment:FairyRaven/Fairy Tail Chapter 425: Sabertooth X792, Review and Commentary/@comment-76.121.234.236-20150324105814/@comment-7418318-20150325173916

If you mean he trained to save Frosch, that's a clear no. He trained to kill Acnologia.

If you mean he chose to train for "only" one year and then return, instead of keeping going... that could be possible, but if it is I have to wonder why he and Lucy went after Wendy first.

If he had returned early due to the warning, why didn't he ask Lucy to track down Gray first?