I'm not suprised at all
I know a few people who work, or have worked for ARM - including marketing people. They are all straight-talking no BS, no FUD people.
They know that any small short term gains they make trying to scam people will just erode the long-term confidence and good will they have built in the industry. Telling it like it is is more beneficial to ARM in the long run.
Anyway, the licensing is very unlikely to be linear with the number of cores. The ARM fees for 8 vs 6 (or even 4) cores is likely to be very low. That reduces any short term benefit in scamming designers.
Leave the FUDding to Intel.