You're exactly right. Obviously we're not dealing with trap here, so I didn't use the word "standard" or velocities in the 1050-1200 range. My point was that in the realm of today's actual hunting loads, velocity of, say, 1450-1600 increases downrange pellet energy very little. The 1-1/4 oz 12 gauge lead load at 1330 has been around a LONG time, many decades, and COULD be called a standard 12 ga field load. 1300 is pretty well in the middle of 1290, 1330, & 1250, & is a common velocity in 16 ga hunting loads, so I chose that as the bottom end. I'd go so far as to say that from 1250 to 1330, there's no difference in downrange pellet energy for any given "pheasant shot size" & metal type. When I said "hyper fast", I was talking mostly about 1550-1700 steel, although for lead & other dense shot, I'd almost call 1400-1450 hyper fast. (I'm old school like that.) I just don't see the benefit, but if that type of speed kills for you & you're confident shooting it, by all means, shoot the speedy stuff.
It's my opinion most pheasant hunters, especially the average hunter (who spends zero minutes at the patterning board & tends to take longer shots), would be best served to shoot something ballistically very close to lead 5 (or even lead 4), rather than something ballistically "smaller" & think that 1400-1600 fps is going to make up for it. It won't. In many cases, it's a marketing gimmick that leads to over-confidence, worse patterns, & ultimately more lost, crippled roosters.