Text blending in linear space perceived as “too thin” and inconsistent because font weights are choosen for the sRGB [1].
With light fonts at small sizes, sRGB blending also has apparent weight changes with the background [2].
But with bold fonts, the weight is consistent only shapes are perfectly smooth with the linear blending [3].
And with more colors, the sRGB blending is a failure [4].
[1] http://i.imgur.com/qKDfCnj.png [2] http://i.imgur.com/Z6sOUNI.png [3] http://i.imgur.com/sTosihk.png [4] http://i.imgur.com/fLpe150.png
