An example is you were an ICC Raider but it was 10 man. From your posts in this thread I asusme (not a good thing to do I know) that you were under the impression you were a decent raider back then and cleared stuff in 10 man thus a normal mode raider at a good pace. However looking at the achievement dates is what peopel need to go back and look.
I'm not doing htis to single you out just a s a referene as many seem to only think back and go "yea I cleared that no problem but raids are way harder now I cant do them now and I could then!!"
you got heroic frostwing halls 10 man on 08/22/2011
I got heroic frostwing halls 25 man on 11/26/2010
8 month difference
Even something like Onixya lair 10 man
You got the kill 06/10/2010
I got it on 09/24/2009
Just about 9 months difference
If you go back to TBC you can see that back then raids were like today
you got the lady vashj kill on 10/09/2011
I got it befor 10/14/2008 but that is the earlyset the achieve can go back so were talking years not months
Even the black temple
10/10/2010 vs 10/14/2008
This isnt a "Im way better than you" but I feel many that are in the same boat as you fail to go back and look at those dates and fail to realise they were tiers/ months behind the raiders of that era! They also had allot of valor gear and or in some cases the next tier gear buffing them in many cases and allot of them did things with a huge buff ala ICC... ALL things you will not have in current tier raiding on normal mode and this is what is steem rolling the previous "normal mode raiders".