I think some people are seeing this as a kind of Van Nistelrooy situation, as great as Ruud was (one of my favourite United forwards ever) and how many goals he scored, it can be argued that the team benefited greatly, more, when we played someone like Saha with Rooney instead of him. Now they aren't at all similar players, I think Van Nistelrooy was a better goal scorer and was far better technically than Lukaku, but I think for some people trying to argue against Lukaku here it's a similar sort of situation. Personally I'm not sure what to make of it yet, he had a great game today, but he's also had some really bad ones this season and calls for him to be dropped have been justified in my opinion.
Props on him today though, battled like mad and won us the match against a top opponent. But I think people on both sides are too quick to go either way; For example, we wont win the league with Lukaku upfront even though he hasn't had a full season with us yet is a pretty irrational statement to make currently, but then the other side of it is, well Lukaku has been poor a lot this season, through his fault or not, but then he has one good game and everyone's quick to jump on the "HA, see, told you!" bandwagon and completely forgetting the past performances like nothing happened and putting aside peoples genuine concerns with him in the first place, today was fantastic absolutely, so lets hope both sides can agree on that and hope we have more performances like that from him going forward