The article is here but the main point is below…
http://www.neogaf.com/forum/showpost.php?p=38592345&postcount=18327
The Feel of the Game:
Controls felt great. I played default and ended up playing at 6 sensitivity as opposed to 4-5 sensitivity when playing Reach. Take that as you will. Everything is smooth, responsive, and works just as you would expect. Weapons take skill, but are very predictable and lethal. Auto aim felt significantly less when compared to Reach and 1v1s felt way more intense. Killing opponents took less time than Reach, which sped up the gameplay. Bleed-through seemed to be back, but I’ not 100% sure. Most importantly, as DominoTheory pointed out, Halo 4 is a gun game. Grenade and melee deaths/kills were few and strafing is as important as ever. I noticed that jump height is a lot higher than in Reach, but maybe not as high as Halo 2/3. On screen text (Killing Spree, Headshot, etc) was barely noticeable, but I do feel like the new color scheme of the medals made them harder to see.
