I have no idea what game you were watching. Chelsea was defending for 60% of the time, on the home pitch. Chelsea created little from open play, and only wad dangerous when they skipped United midfield by Drogba holding his own against the world. It's not like Chelsea wouldn't like to hold the ball like United did, but they weren't able for various reasons, one of them is Mou realizing playing high up will leave Terry and Ivanovic even more exposed. United has 3 really good chances, Chelsea had 2 IIRC. On different day, it would be different result. But it didn't. Chelsea hold their composure when they needed it, Untied didn't. Thats why Chelsea will be champions this year. It wasn't Mou's typical defensive setup like against Bayern or Barcelona, but yesterday it was good enough to handle this United side.
I take that game as a very positive thing for United. Really looking forward to the next season. I would be scared if I wasn't United fan. For the first time in last 3 years, I think we have real chance of getting far, far in CL.