User blog comment:FairyRaven/Fairy Tail Chapter 435 & 436: The Cry of Victory & Memoirs, Review and Commentary/@comment-112.210.161.150-20150519041321/@comment-25111584-20150522195418

For the Exceeds, there's also the fact that the ones with major roles have only been partnered to Dragon Slayers. Huge coincidence there. Don't think it'll be explained though, unfortunately.