There is more information here:
"For those of you who also own a PlayStation Vita system, the game supports cross-buy, cross-save and competitive multiplayer cross-play. If you purchase Ratchet & Clank: Full Frontal Assault for the PS3 system, you’ll be able to download the PS Vita version at no additional cost when available in January 2013."
I just got off a chat with a PS rep about my new R&C Full-Frontal Assault game which has on the box "includes downloadable version for the PS Vita system. It don't...
This was known for a few weeks now. It's not new, though I can understand how not everybody can be on the lookout for news. But in any case, it's not misleading since Sony did forewarn people about the delay of the PSV version. You'll still get it without paying extra though, so it's just a minor setback~.