yea. my first time healing i did 200k (at lvl 19 on my operative). a number that when i pull doing dps i cant help but get 5-7 medals. i had 3, because i was doing more ball carrying/tossing.
you're right, healing is very under-rewarded. healers already were under played and somewhat underpowered (relative to WoW and Warhammer). maybe thats why i only ever see 1-2 per game, IF any.
as for the OP. 700k? gosh darn man thats *********** beast. I had never seen anybody break 300k in a game, dps or healing (combined too, thinking of it).