These forums seem to suggest that indeed people are still having problems in heroics - so thumbs up to you if they are working for your guild.
I can give you the information that several hundred guilds are 7/12 raids and there are up to 3 heroic raid bosses down. So I am not sure if you are trying to brag here that you can do heroics easily, while at the same time showing that your guild is rather much behind in raiding.
Not least this should be an eyeopener to you how broad the skill level of players and guilds is...and yours is somewhere in the grey. You may smile condensendingly on those with difficulties in heroics, yet raidguilds are much further and never felt the need to make (another) whiney topic on this.
They just play and advance....