That quasi-experiment with no control group on the subject of first wort hopping has been filling glasses for almost a week now.

I got moderately high bitterness in this beer, which means, I think, that bitterness from FWH is moderately high. I've read somewhere that one should approximate FWH at 2/3 the bitterness provided by a 60 minute boil; while I can hardly claim to be so precise from my tasting of just one FHW beer, I will say that I think this is probably a good estimator.