I wrote about something similar, albeit a little different, here, "Halt and Goto Meeting", which provide some examples from Knuth and Feynman.
To some degree, I think it depends heavily on the person. I know some people that can do 2-3 things at once quite effectively, and don't seem to be as bothered my interruptions - whereas I can't even listen to music with lyrics in them while I code because I find it too distracting.
Based on my own experiences and observations, I think that interruptions are tremendously damaging to productivity, but not any more so for programmers than others. There's value in getting into the "rhythm" of your work, I think.
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