Their GL gives them some flexibility because they can do a quarter end close in less than 2 days --- many larger companies require 3-7 days
in a good or even 'ok' quarter --- they can 'pre-close' quickly and decide whether to book additional revenue to the next quarter
they do it all the time - and ifyou notice they generally 'beat by a penny' ..... (if you like pro-forma numbers that is)