All good points. Here's mine; what ever gear you use, work the fish hard. If you do it right the fish should swim from your hands as soon as you turn it into the current. If your rod isn't strong enough to do that, then you are not using a heavy enough rod and leader.
I catch Springs on my fly rod (fly fishing is all I do) and they swim away without all the reviving. I have been accused of being unsporting a time or two, but hey I don't play my fish to death. Anyone using anything under a 9wt lots of backbone for Springs does not impress me.
Well I guess I don't impress you but I'm not out to impress anyone.
I use 8wt outfits for Spring fishing. Salt or freshwater, big or smaller rivers and 90 % of the time I land my fish quicker than my friends that use 9 wts. I never go heavier than 12 lb test and lighter than 8 lb. I'm stuck on Maxima. So their 8 lb is like most mfg's 10 lb (min). Both my 8wt's are 10ft. My Cofi has more backbone than mt buddies 9wt 9'6" Sage RPL.
In most cases depending on the action of the fly rod a 10ft 8wt will perform as well or out perform a 9 wt. It depends if you're comparing apples to apples. Not all 8 wt are the same. Mfg's and lengths make a difference.
How aggressively you play the fish makes a difference. And when it comes to playing with the big boys the reel makes a difference. My Lampson has a very strong drag and when set properly will tire out Springs or Chums much quicker than reels with lesser drag systems.
I have yet to release a Spring that has died from being caught on my 8 wt (as far as I've seen). Proper handling has alot to do with this also.
Actually I've probably spent more time reviving Coho over my fishing career then Springs, but Spring are a hardier fish imo, especially the Whites.