You feel it at the limit. If you not pushing hard in rough terrain, it's unlikely you'll notice it.
You may not notice your forks are twisting or deflecting until you ride a stiffer fork over the same terrain. It's not a night and day difference, but when your riding at your limit you can tell.
I agree.
I'm generally a pretty skeptical person when it comes to hype (I'm still on 26" and love it) but I don't understand weekend warriors here saying that none of these advancements make any difference when they obviously don't push their equipment anywhere near as hard as the elite riders might. I like the fact that my bike uses the same parts as most elite Enduro/XC racers. Not because I want to be like them but because I can relate to them when watching said race. Now if these advancements are noticed by them and not me, I'm fine with that. I would rather have varying standards to meet the needs of those who push their equipment on my bike (even though I may not feel it) rather than have a set of 'joe blogs' standards for us weekenders to make swapping parts easier and then having racers on bikes that we can't relate to. Kinda like F1 i suppose, I can't relate to those drivers because I will never drive a car like theirs. It sounds far fetched but that's what I love about the sport, its easily accessible and I can relate to those I watch on TV. So, while you may ride the Yarra Trails and not notice the difference between QR9 and QR15 or straight 1 1/8 and tapered, maybe some can.
The mentality that 'I can't feel it so it must be shit' is pretty narrow minded and I attribute it to people who have the mentality of 'I haven't seen it with my own eyes so it can't be real'.
The taper is a proven in engineering, you can gain stiffness and strength where it's needed with little weight gain where it's not. Again, it's not exclusive to bikes. You may not feel it, but does that mean that this proven manufacturing process (bikes or otherwise) is a load of crap?