Schumann must have heard bad performances.
Again, listen to Karajan with Wunderlich in the Creation, both studio and live, and then tell me that you hear no emotion. Wunderlich was the Haydn singer of them all.
Or Gould in the sonatas.
Furtwangler in symphony 88 (Furtwangler was never dull), or Bernstein in the symphonies (always had passion and a range of emotions).
As an Austrian, you must appreciate these performers.
And get a hold of Philip Downs' book "Classical Music" for an understanding of Haydn's life and compositional approach.
Dan, I appreciated those performers but I just can't appreciate Haydn's ice-cold music, a music without any deeper emotions.....