I can't help but keep wondering if "map shift" is a problem invented by someone who relied too much on following the magenta line without crosschecking other instruments...
Well that covers all the EFIS pilots out there.
I guess 90% of map-shift events on EFIS a/c in Northern/Southern Europe are never even noticed.
Its only on an IMC day (because otherwise you'd be looking out the window right?), with high terrain around on final approach, nav-aids with restricted coverage and your map display down at the highest res you'd ever even notice.
I've noticed it once in the last 3 years into AGP I believe.