Actually I don't have to wait to let you know. I have been flying substantial miles on UA for 2 years as well as DL to Asia almost exclusively Bangkok.

I find no discernible difference in the Economy product. Food sucks on both. I find the seats on UA 777 to be more comfortable but thats just a personal opinion. Service is the same completely dependent on the crew you get that day. Connections are the same and my upgrades on Domestic portions are the same.

Since I am spending my own money, DL has gotten about 1/2 my business because of price at the time and my stupid belief that eventually DL management would treat its good customers like NW did for years.

But that is evidently not going to happen. DL search engine continues to be a joke and 1/2 as good as the old NW search engines. Availability of low tier awards is horrendous on DL and can be made up for sometimes on partners but still a joke compared to CO/UA.

I have to admit that the roll over and ease of earning miles kept me as a DL customer for an extra year. But in my opinion the miles are useless for International awards in BE when compared to CO/UA and the Star alliance.

I have waited patiently for DL to improve its search engine and availability of awards . It has not . CO/UA has a far superior search engine and the availability of low level awards is far better and easier to obtain.

I will be Platinum through 2012 and will attempt to use my 700,000 miles judiciously and once in awhile will fly DL but they have lost most of my business going forward and the sad thing is , they don't care.