According to a presentation I saw by a training captain from SIA, many 'habits' in flying a piston twin had to be "unlearned" when they get to the Lear stage of their training
It takes less than one hour in a jet simulator for a good instructor to demonstrate the differences in handling technique. That hoary old myth about pistons to jets has been around for years. Why am I not surprised that "a training captain" from SIA still propogates it...
The Baron of course requires better manual flying skills than a Lear - especially with one engine inoperative. That said, there is no doubt the Baron autopilot system is rudimentary compared to that of the Learjet.
With most international operators including Singapore Airlines, manual flying skills - including raw data instrument flying - which was once a pre-requisite to holding any professional pilot's licence, are no longer considered an essential requirement for command in modern airliners. This is why full use of all automatics are encouraged by airliner manufacturers and in flight simulators.
For that reason, by-pass of the Baron direct to Learjet training is understandable -particularly as the accent with many operators is on autopilot management rather than pure flying ability. But to claim that so called "habits" from piston twins have to be unlearned when a student gets to Learjet flying, is nonsense.