I'd also like to chime in on the whole "5 seconds as the goal" bit.

Plucking a number that sounds good from thin air and then making that a goal can lead to serious unintended consequences. A little better to shoot for % improvement, although even measures like that have to be re-evaluated and retuned with every iteration due to diminishing returns.

I'd rather the team just focus on removing any and all inefficiences where possible and practical, and let the boot seconds fall where they may.

EDIT: hey igor, I'm on YOUR time now-- go to bed!