The common mistake I see is people thinking that CGI improves (or should improve) as fast as the hardware that runs the programs. It doesn't, not really, as the basic principles behind CGI 3D modelling are the same now as when Jurassic Park was made. Yes, they can handle far more polygons, more complex textures, lighting, etc, and it can all be rendered a lot faster too, but just like operating systems over the last decade, though there's been a ton of refinements to the basic software, there has not been any real quantum leaps to the process. Bottom line is that the best possible CGI today will not be dramatically better than the best possible CGI from a few years ago.
Another way to look at this: King Kong, the original version, used exactly the same principle that Harry Haryhausen was using (and to far less criticism) well into the 1980's. Refinements to the technique occurred over the decades, but in the end were the monsters in 'Clash of the Titans' that much better than those in 'the 7th Voyage of Sinbad'? No, they certainly were not, and we are looking at well over 20 years between those films.
Now with all that being said, that doesn't excuse R&H from putting out work that is at least as good as is possible by todays standards. Have they done this with Hulk?
With the night shots I think they are pretty damn close...The daytime shots though I have to say are letting them down a bit atm. Will try and reserve judgement until I see whatever is confirmed as 'final' shots though.