Not yet. You will/would notice it    

And you need to get familiar with it at first. drop/move/save/remove is auto saved.. It is super sensitive trying funny stuff and you get banned immediately. Works flawlessly otherwise. except droping on mobile/tablet. being worked on. also have to carefully move map on mobile/tablet as screen is smaller there.
  As alpha tester got banned while his location got teleported beacuse mobile was in his pocket for a while


Most accurate/spot-on locating is with GPS and mobile data being enabled to load GeoCashing/HTML5 wallet on firefox android/iOS. No need for WiFi then.
And it also works of course with laptop/PC. Both on tablet/mobile/PC/laptop using WiFi/others location accuracy was off for couple of m/feet and it depends from location to location. and its known to be off sometimes.

I always most accurate locate myself using mobile navigation GPS first. Then I logged into wallet and hit Geocollect to locate me when I was near droped one. Then I walked towards to collect.