Yea, it doesn't change anything (though I like my free spirit perpetuation reduction from this change).

Casting Time = (48 + max Summoning Skill - current Summoning Skill) / 3
Been ages since I tested this. But all my tests indicated that there was a hard cap on the reduction. Somewhere around 20 seconds. I think I compared unequipping 20 skill and still had the same casting delays, which is a pretty good indication on having reached the cap. (You'd expect 20/3 to actually be a few seconds)

Bwahahaha. Mellowy's update is on its way. Let the chaos begin!
The only thing I want, is more frequent and intelligent casts. Nothing worse than having to wait 20 seconds between casts, and all you get is more Choke's. Meanwhile PUP gets separate timers and a pet that actually works.