I think i figured it out.  I am working on a Composite control so the only
file open is the class that i was working on.  Client Code is written out
dynamically by this class.

The problem appears that I was writing out client code using a StringBuilder
to concatenate all the client script to be written out.  This StringBuilder
was going on 600 or so appendline statements and everytime i put my cursor
at the beginning of the line to copy or paste, the IDE obviously feels that
it needs to do something which was taking anywhere from 20 seconds to a
couple minutes.

I have since divided the lines of the stringbuilder into one "main"
stringbuilder and 3 "sub" stringbuilders that build seperate parts of the
client code that the Composite control needs to write out.  Visual Studios
now only pauses for less than a second sometimes and so it now behaves much
more acceptably.

Cheers!
Copa