There are a lot of what you might refer to as "Pop Christianity" theological apologists among that list, but other than Professor John C.L. Gibson, there are (as far as I can tell) no Professors of Hebrew from any world class university mentioned in your list. There is no statement from Dr. Gibson that the writer of Genesis did not intend to convey a 24 hour day or a universal flood. The list specificially states that these are scholars and theologians who are merely "open to an old earth interpretation." While they may be "open" to it, not a single one of them can refute the statement of Professor Barr that the author of genesis chapter one intended to convey to the readers that the creation took place in a series of six literal 24 hour days.
As noted in the statement from Greenville Presbyterian Theological Seminary, the idea that it took billions of years to create the heavens and the earth and that we are in the seventh day and all that simply was foreign to the Christian Church and to Judaism until the 19th Century. So for 19 Centuries the great body of theological scholarship was in agreement that the passage was intended to convey 24 hour days. Additionally those who argued for a non-literal interpretation up until that time were not arguing for more time than 6 24 hour days, but were arguing that it occurred instantly.
The fact of the matter is that the day/age theory is new. It was developed not on a biblical basis, but as a reaction to scientific theory and data. IOW these men have changed the interpretation of the bible to meet current scientific thought.
Now can you point to any world class Hebrew Scholar at a world class university who actually disagrees with Dr. Barr's statement that Moses intended to convey that these were 24 hour days?
Since when is Walter Kasier, president of Gordan Conwell a "pop" apologist? He's a world class Hebrew scholar at a world class conservative theological seminary.
In fact most of these people are the some of the most respected in their field. Norm Geisler, J.P. Moreland, pop apologists? Give me a break.
And to say that the day age is new is absurd when as far back as Augustine they were talking about it!