Saddle tilt is probably one of the most sensitive areas that small changes can be noticed. So much so, that I set mine with the use of a bubble level and flat surface set on the saddle. I can insert metric allen wrenches between the plate and level to achieve nose height increments of 1mm. 2-3mm of nose adjustment is realatively large.
With regard to saddle height, I can certainly tell a difference in adjustments of just 5mm. As can I with bar adjustmens. But, due to the flexibility of arms and riding with them in a bent but more or less static position, bars seem to be the least important.
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Birth Certificate, Passport, Marriage License Driver's License and Residency Permit all say I'm a Fred. I guess there's no denying it.