🚀 go-pugleaf

I have been told that the ST runs as much as 30% slower than 'normal' when
used with the Atari monochrome monitor.
I assume this means compared to running the same software using the color
monitor.
Does anyone know if this is true, and if it is, why ?

Secondly, I have also heard reports of 68020/68881 boards available for
the ST ( ie. a series of articles in the German magazine c't ) and at the
same time, I have been told by several people that at present TOS does 
not handle the 68020 instruction set ( TOS uses instructions for system 
calls that are now legal 68020 instructions, etc).
So, does this mean that those people using 68020's are running different 
operating systems...?

Any who can enlighten me on these matters would be greatly appreciated.

James