Have you noticed that any 80 running around Dalaran, from any non recognizable guild can have a pretty awesome gear score? Well I definitely have, and I love to inspect them and see what all they have equipped. Awesome gear from ICC? No, not even close, not even gear from ToC. Just gear you can buy from the vendors. Although I was annoyed when Blizzard made awesome gear available to everyone, I have come to realize, just because the gear in Dalaran has an awesome gear score, does not mean it is better gear and equals more dps. I think mostly, it is not people's fault that they don't understand, you would think if it is a higher ilvl it is an upgrade.
When I run with people who don't typically raid, but have high gear scores, I can definitely tell in their dps. Why is it that this person has 245 items and mine are only 232, but my dps is much higher? Probably the stats are better on the gear I choose. The 245 gear from vendors is not as good as getting your tier 9 set, on most classes. (I don't play all classes so not sure for all) And just because the cloak for frost badges is the cheapest thing available does not mean you should buy it. I mean I am talking about dpsers here, and the cloak has Mp5 on it! Why not get your tier gear first? Or at least the belt which is super awesome? Ya I know, the tier gear is only 251 ilvl, instead of 264, but many of the 2 piece set bonuses on tier are awesome. I only dps on a shaman, mage, and feral druid, but I know these are all worth it. I know that a boomkin is worth it as well. So research and find out what people of your class are saying about t10 set bonuses. O and btw, the triumph badge trinkets suck! Ok, I have one on my shammy because I had absolutely nothing else from raiding, and I hate using it, but if you have something else you should definitely be using it. Equip/Equip trinkets are almost always better than Equip/Use.
I have a great story that illustrates my point. There is a mage in my guild, who is a decent player who could not for her life figure out why her dps was lower, much lower, than mine when my gear score was much lower than hers. Well I inspected her, and freaked out! Her haste was really low, her gear was all bought, and her trinket was the hit trinket, when she was waaay over hit cap! So I proceeded to ask her if she had any other trinkets. She did, but they were both ilvl 200. She had in her bags Embrace of the Spider and Abyssal Rune. So I told her to switch out her awesome ilvl trinket, and switch out most of her gems. There were a few pieces of gear I told her to go grab. Including finishing off her t9 set bonus, instead of those juicy 245 helms, and shoulders, etc. from the Dalaran badge vendor. We had done a test on the IF dummy, and yes I realize how this isn't the best way to gauge dps. Her dps before switching out gear, was around 3k. Her gear score was well over 5k at this point. After she did the recommended upgrades/ilvl downgrades, we did a re-test. Her gear score was then 4700. Yep I forced her to lower her gear score. So the re-test. The conditions were the same, her dps was over 5k. WHAT!? But doesn't gear score mean everything? As any skilled raider will tell you, no! Also, to further my point, she went from doing 4k on tank and spank fights to doing up to 7k!!! Pre- heroism! I mean wow, what an improvement.
This doesn't come from people being stupid about the game, it would just seem like a better gear score equals higher dps, and maybe it should. But it absolutely does not. If you are serious about improving your dps you really need to learn what stats are good for your class. If you are unsure about gear there are so many people willing to help you, so ask them. People ask me all the time and I am happy to help. It doesn't help that people in Dalaran are requiring a certain gear score to go to a certain raid. I realize there has to be a cut off, but gear score does not equal dps.