I found the post and 85% was indeed the number whylightbulb estimated for the attraction's show elements being screen based. May or may not be exaggerated, but he apparently had a hand in its creation so i'm inclined to assume he knows what he's talking about.
http://forums.wdwmagic.com/threads/...rvations-thoughts.882599/page-30#post-6038275
I do want to mention so it doesn't look like i've my head up Disney's rear- there are plenty of newer Disney attractions just as guilty of using too many screens as Universal attractions. I can name a fair few. Toy Story Mania is a good example. The so called headliner "E ticket" planned for Avatar is also said to be a Soarin-type simulator likely with very few (if any) physical elements. Main reason i'm more interested in the boat ride at this point which I hope is not canceled or value engineered to hell. There are also some rumors (hopefully unfounded) that Shanghai's version of Pirates is going to forgo the traditional physical sets/animatronics in order to make scenes more video based, don't know whether there's any truth to that. We'll see what becomes of Ratatouille, looks like there are some nice physical sets but i'm sure it will use a lot of video as well. I'm also a bit worried about Tom Fitzgerald taking over creativity at EPCOT (despite articos and tirian saying that this is a good thing, i'm still worried until we see otherwise). Even the otherwise fantastic Mystic Manor uses more video than i'd have liked...
So despite the Mine Train and some other Disney rides using physical elements, Universal isn't the only one open for complaints for overusing screens. Sounds like there are a number of people in Disney that want to go down the same path.