I remember seeing that on a few pretty reputable sites (although I don't recall any differentiating between the different flavors of Tab 2 7.0), but when I searched Samsung's site, I saw no mention of updating any tablets to Jelly Bean...
However, there are reported leaks of the Tab 2 update, and also some people claiming that their Samsung tabs are receiving the updates (some versions in certain parts of the world), so I personally think it is coming.
It seems that even if it is planned, Samsung is like many other companies, and doesn't announce schedules in advance. If you look at the Samsung site, there is a list of some cell phones to be upgraded, but the only schedules they publish are "Released" and "Coming Soon" and even though I think "Coming Soon" is a cop-out, apparently their business model discourages announcing actual dates.
So, my best guess is "Coming Soon" to the Galaxy Tab 2 7.0, with no definition of what "Coming Soon" means.