A few observations:
1.) I will second CWO Marine's assessment on the importance of warrant officer pilots vs. Marine Corps commissioned officer pilots. Whereas the Marines' commissioned officer pilots start as lieutenants with little responsibility and work their way through all sorts of smaller jobs--such as Forward Air Controller, and what have you--Army warrant officers stay in the cockpit and might have an additional duty or two (running flight schedule and whatnot) until they become "tracked", where they specialize in maintenance, safety, tactical operations, or being a flight instructor. They build thousands upon thousands of hours.
Army commissioned officers, on the other hand, start off as platoon leaders of sections of five aircraft or so, and do company commands in companies of ten ships (including the maintenance personnel and pilots). They worry a lot about staff work, administrative nonsense and maintenance, sure, but that also gives them the "big picture" outlook on running the organization. The mix of having specialized warrant officer pilots--almost like your NCO corps--and commissioned officers, who also have credible flight and leadership experience, is dynamite.
2.) The optempo of Army Aviation has many drawbacks--personal life being the most obvious of them--but it quickly builds valuable flight time on aviators early on in their careers. Bonus if they've flown in the mountains of Afghanistan.
3.) Marine aviators seem to have more experience in helo ops on ships than Army aviators do. While landing on a pitching ship is not without its challenges, it's not exactly the best training for landing multiship into a dusty LZ, where the air might be thin and you might be full of troops.
4.) Overall, I'd say Marine helicopters are pretty good. To start with, they have winners in the AH-1 and UH-1 series. The CH-53 is a great heavy lifter. However, I have mixed opinions on the Osprey. If you want to run ring routes--flying a bunch of troops to a lot of bases in one day--then the Osprey has its merits. In retrospect, a combination of several light fixed-wing airplanes, UH-60 Black Hawks and Chinooks would have been a better investment. The Marines already operate the Black Hawk in HMX-1, so it wouldn't be a huge paradigm shift for them to order a few more. Additionally, in keeping with the Marines' habit of making Army and Navy equipment work better, they might consider that the CH-47 Chinook is a proven design, it's highly capable, and get this--it floats in water. Perfect for littoral operations!
5.) Finally, and most importantly, the Army rules helicopter ops because, quite frankly, that's all the Army's allowed to fly. We ought to do it well.
Overally, I'd definitely echo many of the respondants at Tom Ricks' website--the warrant officers make the difference. This will probably irk many commissioned officers who lament warrant officer traditions such as the WOMAN--the Warrant Officer Mandatory Afternoon Nap. It may also irk some senior NCOs who are endlessly frustrated at the sideburns warrant officers tend to sport. But when the bullets start flying and people need to be evacuated, the warrant officer corps is worth its weight in gold.
And, in some cases, it might be a lot of weight. Love you guys just the same. ;)