As a mechanic I was taught to put them on VERY tight - you don't want a customer coming back claiming that their wheel fell off. So expect mechanics to be that way. They are covering their own butt, and it's overkill. Follow V's advise and you'll be fine. If you close the QR lever so it's parallel and somewhat offset from the fork blade or dropout, you can squeeze against that and tighten easier.
Oil is good, grease is better.
2007 Peter Mooney w/S&S couplers/Terry Butterfly
1993 Bridgestone MB-3/Avocet O2 Air 40W
1980 Columbus Frame with 1970 Campy parts
1954 Raleigh 3-speed/Brooks B72