In my raid guild we only count progression through 25 man raid encounters as progression. Yes I take a group through 10 man naxx and os because there is gear to be won but most of these fights dont get hard until you try OS 10 man 1d and Maly. But most of 25 man bosses actually require someone to know what they are doing to be sucessful at downing the boss. I am happy that I am in a guild that only judges 25 man content. And once we down Maly 25 man we are in the top 10 alliance guilds on the server I play on.
And thanks ciderhelm the vids helped us down sapp and kz only took 6 hours on kz over 2 days and 600g in repairs and flasks

