Going to the web for a new, untried recipe is very hit-or-miss. I think it's more useful if you've already made something similar.
If I try something new I usually go to two or three standard sources, e.g. Joy of Cooking, Cook's Illustrated, Silver Palate or Dr. Oetker and then compare with a handful of search results from the web. That way I get a feel what the range of each of the ingredients is.
What would be really interesting to me is an app that pulls down as many recipe sources as possible, normalizes the ingredients and displays them all on a percentage scale. Doesn't really help with learning a new recipe but that would be great for experienced cooks looking for specific variations.
