Absolutely! That's correct. And just with one concrete wall in between, that's all. And even this camera, from time to time, looses connection. So this 12 meters is the absolute maximum in my case. I heared same from several other people during/after the kickstarter campaign.
It depends extremely if you are downtown with thousands of people, networks, mobile phones, wlan, houses, traffic, and so on ... or if you live on the countryside with the next human beeing 2 km away.
I installed one of my several homebases and starter kits at a friends house "on the butt of the world" and he hasn't got any of the problems with the range i got.
But i just can't move my house from downtown to badass countryside just to be able to use eufy cam ... I have several more cams waiting to be installed and doing its job, but therefore i badly need those range extenders or eufy to improve the range by firmware.
But the promised range by sure is only possible under perfect cicumstances. Which most of us won't have.