On one hand he says that God out of neccessity knows everything there is to know or can be known, but then on the other hand, he says God doesn't and can't know the future because the future has yet to be.
Contrary to his philosophy, time is a dimension of the creation. The terms "eternal" and "God is time" are mutually exclusive. Eternal means, without time, or timeless. Even in the created universe there are examples of there not being "time" as a dimension, such as inside a blackhole, or for any thing traveling at the speed of light, where time essentially stands still or stops operating.
I find his article to be dogmatic without substantiation and void of reason, as well as flying in the face of Scripture.
Eternal: 1a : having infinite duration : EVERLASTING.... 4: valid or existing at all times : TIMELESS. (Merriam-Webster Online.) Tell me again where you got the notion that "eternal" is in opposition to 'time'?
As far as Scriptural definition, see here. It includes word studies on the Greek and Hebrew words used for time concepts in Scripture.