[benzoate]

Well you have 6 numbers and only 5 seconds to show them in. You could show 0 only when the timer has fully completed.

I think either rounding up, or rounding to the closest integer is fine. The authors expectation of always rounding down is the only option I would never expect.

[lokar]

I think people have different expectations for:

"What time is it now?"

vs

"How much time is left?"