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.
  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.
http://i.imgur.com/pR8xjGW.jpg