Interesting, I just got some 4th gen ones and they are dates Feb 2014. However, they haven't really been easy to get hold of until very recently, so I suspect you may have got some of the last gen 3's!
While that may be true, the manufacturing date has nothing to do with fakes. If they can fake a wrapper, they can fake a date code.
Thank you for helping!
I suspect they may be counterfeit because (photo below):
1. blue smudge
2. HR-4UTGB was not manufactured in 2014
3. the word "CONSULT" is broken without a hyphen.