Of course it doesn't necessarily mean they're counterfeit. But AFAIK the problem that's causing the consumer to still have to break in, or train the batteries due to the manufacturer's neglecting to already have done that FOR the consumer BEFOREHAND is a problem that's both bad and coming out of China... the reason why it is bad is because the consumer might, during the break-in period, run into manufacturing defects that could in fact be dangerous as well as that could have been detected by the manufacturer instead, and, therefore, could have been easily eliminated by the manufacturer.
As for Smok mods, those things can be really dangerous even when they're not fakes. That's because some of them have repeatedly been reported to suddenly jump to max power without them giving the user any kind of warning sign via the front display on the mod in question so that, if the mod starts auto firing after that, it will be draining each battery continuously at more than 25 amps. It means that even if you're using genuine 20 amp batteries in those things, chances will be you'll still be China'd... regardless.