Honestly, you guys have turned a mole hill into a mountain. Our eyes and brains are capable of coping with much, much more information as we read music and the ability comes with practice, patience and experience. In the time taken to read all the above submissions we could all have mastered reading tenor clef ? Life could be worse, much worse, if our music was written out only in bass clef and at pitch using 8va for high notes. Imagine reading all those short little lines and spaces above and below with lots of sharps and flats and different keys AND fast 16th note passages.........
IMO Damon's example above shows good use of tenor clef because the lowest note A is in the middle line and the highest note D is not too far above the top line to recognise quickly. To see if using treble clef would make for easier reading I suggest copying out the transposition on a sheet of manuscript.
My usual overall comment is that context is everything.