that is typically due to the console and the type of emulation you are usingm, in this case the firware logging buffer..and typically nothing to worry about..
if there are errors in /etc/rc.log or dmesg then you need to address those. which would speed up boot times.
boot times are dependent on how much hardware your server has ( #cpus, amount of RAM, io cards, etc ) as well as the number of sw services running.
booting from local disk or san ?