It's a common claim, but I stay away from recent batches unless I purchase a lot of different ones and they are included. I have noticed that some scents do seem very similar but considerably weaker. Not much you can do other than search for the older ones. I get a good laugh when I read posts about the fear of getting "old stock" and worrying about "freshness." These aren't brownies people! They are highly synthetic in almost all cases and unless you are mostly in it for the fleeting top notes you probably want "old stock," IMO.