Every design is different and there are factors that can affect the speed. Website below has speeds and comparison graphs from popular small jets.
A high-speed jet is nowhere near as fast as a lightning bolt.
about as fast as a normal "SouthwestTM" jet can which is about 500 to 800 mph.
There is no such thing as a jet train.
Very fast.
very fast
No
Fast.
1000 mph
Marvin is the only fast jet of ultimate fastness
The F-18 is a very fast plane
30 knots
About 1,000 mph