I'm a true Boeing fanatic. And Airbus fanatic. And, and...
From a pilot who has flown A-4 fighters, B737s and now A320:
The sidestick takes minutes rather than hours to get used to. But there is a lot to learn when transferred from B to A or visa versa. The philosophy of many aspects of the flight management systems are rather different, if not very different, and the sidestick contra yoke comes in as a very minor issue in this respect. It is the visible issue, the others are "hidden" for we laymen in the FMS software.
You mention "better feel, grabbing the controls with both hands". There is no difference here. When actually handflying the planes, which happens sometimes as little as one percent of the actual flight time, then the PIC has his left hand on the yoke or sidestick and right hand on the throttle. And the FO the other way around.
One great advantage of the sidestick configuration is that it makes room for a foldable table which is very convenient for paperwark and meals etc.
I asked my friend, if FBW systems had been invented BEFORE the airliner, and not the other way around, would then anybody have got the idea to put a yoke on an airliner? His answer was short: "No". If computers had been developed to the 1975 level already in 1930, then both Douglas DC-3 and Boeing 247 had been flying with sidestick control.
Since yoke contra sidestick is a valid issue, then I never understood why both Boeing and Airbus didn't make both an option on all their FBW planes. The reason why the haven't done so can only be that it is such a minor issue.
Best regards, Preben Norholm
Always keep your number of landings equal to your number of take-offs