Live Tourney betting tell question

[Kaka]

I may be reading too much into recent results but decently experienced players that bet in a single motion by peeling off a stack and placing the stack in the middle without counting or stacking the chips or announcing an amount are bluffing.

True or false (or feel free to rephrase if need be):

Players that bet without counting out the chips wagered or announcing an amount are generally bluffing.

Followup - true or false in a cash game?