Similarly to last year, Konami will release two demos for PES 2013.
The first one will be released in the second half of July, and the other will be out just before the game's final release.
A positive move for me as it allows Konami to collect more feedback from fans, allowing more improvements to be made, meaning there's a better chance that the final version of the game can reach its full potential.
Update - June 18th: SverigePES have revealed that the new training mode will feature in the first demo:
"Training Mode that has received a major upgrade, and will be testable in the first demo that comes out in July."
Thanks to Marvin Ronsdorf and SverigePES for the exclusives.
Sources: 1 | 2