Sorry to resurrect an old thread but there is so much BS in this thread I could not resist.
I have clocked a lot of k's on road bikes, MTB and trikes, a trike will out brake an upright bike of any type by a massive factor and with more control, when you brake weight transfers forward meaning that the 2 front wheels are getting a lot of grip a opposed to a bike where the rear unloads to a great degree, because your body is laying to the rear of the trike you will not go over the handle bars or have the front wheel twist, if you hit a car/object you legs will take the impact protected to a degree by the boom, on a bike you will end up head first into whatever.
Handling wise a trike can change direction instantly, yes you may lift a wheel but it will let you go around a car door with almost no notice, a bike has to ride through the direction change.
At high speed a trike is magnitudes safer due to the above and the fact that if you hit a loose surface nothing happens even if you brake, flat front tyre at speed boring, I have had mine over 90 kph and every ride will exceed 60 kph, yes it is silly but a lot safer than a road bike at similar speed.
Flipping is normally a learning thing ie. learning to lean in on corners.
This is years of riding in traffic and steep hills.