Well, to put it one way, I did a DIPA that mapped out to 28 oz of hops per half-barrel. That means that the hopping was 3.5#/bbl, or roughly halfway between where Stone Ruination (2.5#/bbl) and Stone RuinTen (5#/bbl) are. 10 oz were dry-hop, Columbus and Simcoe, and another 14 oz were 10 min, 5 min, or 0 min additions.
This was a hoppy beer.
I kept 10 gal for myself, and 5 gallons went to a buddy who brewed with me that day. Because insanely hoppy 9.6% ABV beers move slowly at my house, those 10 gallons lasted me about 5 months.
At kegging, the beer was beautiful. At 9.6% and with a significant malt bill, there were still so many hops to make the beer hop-forward. By the end of the 5 months, though, it was practically a barleywine. The hops had faded so much that the malt bill necessary to stand up to that many hops now became the dominant factor, and the hops second fiddle.
That experience taught me that freshness truly is key for such hoppy beers. Frankly, I'm not going to brew DIPAs any more (unless i get someone to split 5 gallons each with) because I just can't drink them fast enough to remain fresh...