Does smoking marijuana together with cigarette tobacco speed up the
obsorbotion of psychotropic substances like THC into the human system and
thereby increase the initial, yes almost instantanious "high";  almost
in the same way that
certain chemicals in tobacco speed up the nikotin absorbtion into the body ?

Smoking marijuana with tobacco doesn't do it. The only thing you can
add to marijuana to enhance the absorption of THC into the system is
lots of other marijuana.

It amy be easier to try a different strain, Tutuzdad and Emanon23, one
with higher THC levels. I'd go for something like Haze, White Widow,
or any Northern Lights cross.

Grass nowadays is much more potent than when I was... um, watching
other folks use it back in the 70s and 80s. And Emanon23, if you can't
wait a couple of minutes for the high you are a serious Type-A and
will be dead by the time you are forty. Some dip coroner will blame it
on the pot and ruin it for the rest of us.

That's all right, Mark.  
We believed that Clinton didn't inhale  - and everything else -  right?
The good thing about marijuana is that there is no big stink about
passive smoking, so sitting around in a smoke-filled room apparently
has no negative  -
or should that be "positive"? -  effects.