thats a bunch of bunk. feral has been pretty much the same since season 1. hard to do right, requires a lot of support to be effective, but doable. you probably wont make the top .5% (but ya never know) but i know feral is definetely capable of 2k+ on a 5's team.
the trick is that it requires a high level of gear (at least the season 1 set + pvp off-set epics) and the right group setup. you probably want a warrior and either a rogue or hunter, the warrior for the dps and disruption and the rogue or hunter for extra dps and control as well as general utility. some teams even go rogue/druid/hunter/war+healer (generally a druid, sometimes a priest). the warrior is also optional, as rogue/druid/hunter is a good physical combination to start with, and having a priest + druid gives a strong magical backbone too.
a good 5's setup to start with would be rogue/fdruid/hunter/spriest/rdruid. the resto heals, the feral does mainly dps while watching for healer lockdown while the spriest, rogue, and hunter dps the primary target hard. two properly specced druids can lock out two healers on their own, and with an MM hunter and spriest you get two ranged silences (silencing shot and silence) as well as an aoe fear (another spell interrupt) and scatter shot (a fourth interrupt).
thats a LONG time of not healing.
the general strat is to have the resto druid heal and control a melee (sometimes this means kiting, mostly it means rooting) while the priest, rogue and hunter dps/control a target while you burn their target hard. your job is to keep an eye on a healer and feral charge > bash > cyclone control the healer to allow your other 3 dps to finish the job on the target. if its a two healer setup, your resto druid needs to help on the second healer while you get the first. meanwhile, your priest watches for BoP or DS to or ice block and preps the mass dispel accordingly while your hunter and rogue continue the dps and watch out for any potential interrupt opportunities.
between two feral charges, two separate cyclones, two bashes, two ranged silences, an aoe fear, blind, kick, kidney shot, and scatter shot, you can REALLY shut down casting. solo non-druid healers will hardly be able to cast without using bubble (which your priest breaks).
feral charge x2 = 8 seconds of interruption.
silence shot = 4 more (12 total).
silence = 5 more (17 total, first feral charge is cooled down)
scatter shot = up to 5 more (second feral charge is cooled down)
bash x2 = 7.5-10s of stun time (depending on who its used on)
cyclone = 9s of being heal immune or unable to heal on two different targets
thats a lot of control man.
requires good communication too. everyone needs to know who has what and when they have it, and when they dont have it.