Works for me! But don't get the idea I don't ever use the rear shifter, it's just mostly on my commute that I flip the front back and forth. My cadence is probably 80 - 95 or so most of the way. One thing I've noticed is this bike's super record system shifts much better than an early 70s nuovo record set up I had on a bottecchia I used to own - it wasn't as crisp and was prone to needing on-the-fly shifter D-ring adjustment.
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1989 Schwinn Paramount OS
1980 Mclean/Silk Hope Sport Touring
1983 Bianchi pista
1976 Fuji Feather track
1979 raleigh track
"I've consulted my sources and I'm pretty sure your derailleur does not exist"