I had to quit reading when I read "degrees Kelvin." That ruined it for me. From what I remember Kelvin is measured simply in Kelvin, not degrees Kelvin. See here - http://physics.nist.gov/cuu/Units/kelvin.html.
Your link is invalid, and Kelvin is measured in degrees.
Degrees Kelvin is fine. K is the scale and it's unit is degrees. All temp scales are in units of degrees.