When the system is booting there are four icons which start greyed out, and 
get put into full colour as the system boots. The problem is that the first 
two, the hard drive and the keys, are pretty much grey/white anyway, so unless 
you see them change colour it's hard to tell that anything has happened. Maybe 
if the greyed out ones were darker, or maybe 'blued out' instead so they blend 
in with the background a bit more, it'd be more obvious something was 
happening? Just my two pence :)