I used to work at Tiktok. His speech feels consistent to me. Unlike some ceo's like Mark (fb)/Evan (snap) he rarely spoke to general employees. There was no weekly/biweekly q&a to hear from the ceo. You could easily go months with him not doing any company wide talks/emails which did make top level transparency feel bad. Maybe china had more ceo communication, but lacking on US side. The rare times he did speak/email his wording tended to be much more direct and honest than I'd expect from an executive.