Ianto's been in Cardiff for how long compared to Jack?
Good Lord, that's never even occurred to me. How shit am I?

Rewatching bits, Jack offers almost no information about his time with the carnies and no resolution to how he got out of being involved with them.
Yeah, like I said in my review at the time, so much potential wasted in this episode, there were so many chances to get some personal insight into both Jack and Ianto (this episode also being the one that cemented my theory that Ianto's family are all dead) and they were all just thrown away becasue we needed the plot explaining to us over and over again.