Sounds like you're trading increased wear on your clutch and all those related parts instead of wear on the synchros.

 

I disagree that double clutching is required on synchro transmissions. I, like many others, have been racing synchro boxes (in my case since the mid-80's.) I have never fried a clutch, synchros, or anything in 20 years of racing. Just rev matching, never double clutching. Usually, the trans, clutch, etc come apart every two years for inspection, then right back in with a new Throw out bearing because they're cheap. one thing I particularly don't like about making 5-2 downshifts is that you might have a tendency to make the shift too early, which could cause the wheels to want to lock or spin slower than the car is moving. As bad, it might cause the car to over-rev and cause engine damage. If done improperly, this will cause your car to spin. To combat this, it is recommended (although not required by any means) to go through each gear so that the braking time is also taken up with shifting time. So, when you are ready to go into 2nd, you should also be slow enough to do it without spinning. Of course, practice and discipline can mitigate this risk, which is why it is stricly optional.

I will admit that in some cars (my old WRX comes to mind), double clutching during a 2-1 on the street sure seemed to help, as the car was difficult to shift into 1st if not completely stopped. Still, I never had any transmission or clutch problems.

 

even if this is true how the hell are they going to know you have in neutral???? Also, keeping it in gear at a red light would kill the throw out bearing.

 

the only additional step i take is engaging the clutch once (with shifter in neutral)

disconnecting collars from the gears does not +wear
engaging the clutch once, with no load, does not not +wear

and by reengaging the clutch at the matched speed, there is less wear than there would be waiting for the tranny to pull the motor to speed.

overall, less wear (though not necessarily the reason i do it in the first place)