And I'm the same way on primary trainees -- no GPS until they can navigate with nothing but a sectional, compass, airspeed, and clock. Then they get to use the GPS, but I guarantee it will fail at some point on their recommendation ride.
I do get a kick out of arguing these same points, with a friend who fly's heavies, and is still an instructor as well. Actually, there are two commercial pilot/instructor friends that I often discuss these points with.
In this day and age, I believe it should be GPS on the first day of instruction. Afterall, a few years back, there was a test conducted with new PPL students using the Garmin 1000 glass panel & the standard "six pac". The "glass panel" students had an edge in navigation right off the bat, as they started with nav on day one. They also completed their PPL ahead of the six pack users.
And so what, if it's handheld. My Garmin 696 is more like a mini Garmin 1000, than a small Lowarance 600c which is my backup. At to GPS failing, sure you can fail it on a recommendation ride, but don't give the student the impression that failure is a common trait. It's now been 18 years since I've lost a GPS signal with my "portable" unit's. They've all been dedicated aviation unit's with external antenna's being used.
We're not still in the old days. There is a lot more restricted airspace, than in the past. There is no reason to promote the old way's as if it's badge of passage to be a pilot. The "old way" is inferior, and that is all there is to it. Sure, the finer points of of using sectionals need to be taught. It's silly and sometimes deadly for anyone to just hit "direct" on a GPS and follow the magenta line. But with all of the added info, that GPSs can provide at a quick glance, it's also stupid to regulate them to a flight bag in the back seat.
As I said before,,,,,,,,,,,,,,,,,,,if an instructor insist's on throwing the GPS in the back, then throw them (him/her) out!
L.Adamson