a crude (but oddly funny) way to tell whos the jounins and whos the chuunins are the ones you see dying are the chuuninss

so far...

and, most of the chuunins are the ones you see defending the city in mass #s (the ones stopping the snakes, or trying to...)

i think the only jounins we need to watch out for are kakashi, gai, asuma, etc.