Does sneaking make it harder for animals to detect you?

[l33tmaan]

It's a pretty self-explanatory title. I think it does, but that might just be placebo?

[redram]

To best of my knowledge, it does not, yet.

[l33tmaan]

Cool, I didn't expect it to. So all it really does is stop you from falling off blocks and lets you fit into 1.5 square spaces, like under a slab? 
I ask because I remember a Minecraft mod that added crouching/crawling and I loved it, since you could fit into 1x1 holes in a totally realistic manner. VS could benefit from something like that, especially if/when stealth actually means something, since you could crawl through the bushes towards your prey to catch them unawares. Might be cool.