(Edited) Absolute proof Iron Banner is complete bullsh*t!
I was making a new warlock and got through the 4th mission or so. I was level 4 with my friends who are all high level like my main. I decided to test Iron Banner because last night I really didn't see much of a difference playing with my lvl 30, it felt like regular crucible. So I joined up with my friends to play some Iron Banner. I was expecting to walk in and get one shotted with an ankle shot, instead I was baffled at what happened. Watch the video, and let me know what you think.
Edit- Here is my second video as well, this was my third game and did even better than my first. http://youtu.be/h2rUdKnB_4M Check it out and let me know what you think! Also thanks Deej for replying at least, I was not expecting that. Although you did leave us with your usual vague wait till the update answer. Please don't just address it, please actually fix it!
A big shout out to my fireteam, thanks for helping me make this video ClearVue, AssasiNinja187x, ojndeath1, DukeNukem786, and xxKunntryxx
For those who haven't figured it out the level difference is capped at a hard 40% damage reduction. Otherwise a lvl 20 couldn't damage a lvl 26 at all. The lvl certainly does make a difference, but it is about as subtle as doing a lvl 20 mission at lvl 18.
I'm lvl 27 and I notice that most lvl 29 people can out gun my by about 1 shot. Its not much, but it makes a difference.