Quite. There are numerous problems with this claim

1). The NFC ariel is too short range, just as Jolla have stated. People have tested this; you have to remove TOH and press the NFC tag directly onto the antenna for it to be detected.
2) NFC is not exposed to Alien Dalvik
3) NFC is switched off immediately after detecting TOH (there's a physical microswitch that alerts the Jolla if a new TOH is being connected) , so even if statements 1 and 2 were to be false, it wouldn't matter. No NFC is available to Alien Dalvik because the hardware is inactive.
4) The sandbox nature of Alien Dalvik does not give it the capability of turning on (or off) any hardware features of the phone

For simple evidence, just try something like Android's Near Field NFC Tester application (or NFC Enabled or similar) for evidence of this.

I don't know what vistaus did, but it didn't use NFC in Android