My most consistent and high achieving heather location is at a place called Coil a Creich. near Ballater in Aberdeenshire. It is known by my staff as 'Electricity place' as the pallets are in close proximity to a sub station. Zero noticeable effect, no ill temper, no drifting problems. Usually 50 to 70 hives there.
One of my bees lowland locations is actually inside the legs of a very large high voltage pylon. This has been raised many times before. Again, no negative issues whatsoever. We winter about 50 under the pylon, leaving about 20 to work the flora in the area for spring and early summer prior to the heather migration.
The quoted study in the thread is nothing to do with sub stations or power lines, more to do with mobile phone networks. Have some sites right beside base staions for those too. No ill effects. The bees do just as well.....or badly if 2012.............as anywhere else.