Excellent question.
TNARS was connected to the North American Theological Society(NATS) for a time. NATS claimed adherence to the Westminster Standards, so many of us were confident of their theological perspective. It was later found out that NATS denied the doctrine of the Trinity and were, in fact, modalist. Upon learning of this I discussed the issue with the founder of NATS so as to show him the errors of modalism and why the Trinity was a biblical teaching. After some discussion it was shown that he was not convicted that the Trinity is a true doctrine. It was at this point that many of us left NATS and separated TNARS from the institution.

So...the school was around before it's current state as a seminary under NATS oversight. And it is this track record that gives us the 4% number. I'm not sure how long NATS has been in existence, but i think at least a few years. TNARS, in its current state, has only been around for a few weeks.

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Larry Bray
Training for Elder - Reformed Presbyterian Church of Boothwyn, PCA
Boothwyn, PA - http://www.rpcb.org/

Free Online Reformed Seminary - http://www.tnars.net

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"The best Christian is still a poor Christian" - R.B. Kuiper