Until Secret History, yes…
“Do better, Kelsier, Preservation commanded, his voice fading. If the end comes, get them below ground. It might help. And remember . . . remember what I told you, so long ago. . . . Do what I cannot, Kelsier. . . .
SURVIVE.
The word vibrated through him, and Kelsier gasped. He knew that feeling, remembered that exact command. He’d heard that voice in the Pits. Waking him, driving him forward.”
This event occurred at the moment Kelsier snapped. Considering Kell had just spent 16 months in the Pits without snapping when being exposed to great stress is normally enough, and had not had an easy life before, and was raised a Noble so endured a beating to manifest his power, and his snapping didn’t happen immediately after Mare died (it happened after Kelsier was back in his tent), and Kelsier somehow knew he’d Snapped when normally people aren’t immediately aware… Well, let’s just say Kell’s snapping was weird before and this event makes it even more suspect.