The question that gets asked is if the telco is a "metal path" and the question becomes, did you reground the telco at the second building? That still only refers to the 3 wire feeder (regrounded neutral) vs 4 wire feeder (separated neutral). Our buddy Ryan made that moot with his proposal to the 2008.
I am going to be curious to see how this works out in lightning country. There is going to be a significant difference between grounds and neutrals in interconnected equipment at the far end. This may require different thinking in the surge protection of some equipment.
