“Son of man” is regarded as a mistranlation...this is how chabad.org translates it...”Ancient of Days” just refers to God and his eternal nature.
Daniel 7:13. I saw in the visions of the night, and behold with the clouds of the heaven, one like a man was coming, and he came up to the Ancient of Days and was brought before Him.
http://www.chabad.org/library/bible_cdo/aid/16490
I enjoyed the article on the early days of the Christian Church as well...”the making of the sausage” is very interesting..
Okay, I get the mistranslation part, but do they think that the "man" is the future messiah going to be given in a kingdom in verse 14?