I/O pins at bootup (Solved)

Just a quick one.
The data sheets for the ATMega328P states that the I/O pins are tri-stated at reset.
Some posts I have seen, appear to suggest that the bootloaded can change these.
Can any one confirm that, until the sketch runs, the I/O pins stay tristated?
Specifically, on the Uno and Nano.

Except 0 and 1 (serial) all pins are input/tristate

Thanks, Septillion.
That is what I had assumed, but I have learnt, over the years, that if I assume something, it will invariably mean I am WRONG. :-)))