Yes, there is a HUGE difference! "Trudging" connotes heaviness in addition to slowness, whereas there is a certain lightness in "shuffling."
I doubt there is any evidence of this graduation to an observer.
But I feel it... and THAT'S what's important!
So still slow. And not able to go very far (2.4 miles is the "long" run).
And I've picked my 5K to enter....oooooo, scary...... Run Wild on Sunday, November 28. It'll be nice to run through Golden Gate Park... or rather shuffle through Golden Gate Park ;-)