Before I write this reply this is purely my experiences based on my AG brewing since July this year!
So my first 2 AG's I was a sprinkler , my beers fermented well and I was happy with them.
And then this brewing lark really bit me, how can I make my beers better?
I started reading threads on this forum and learnt about strip plates ,rehydration, bought the yeast book etc.
The purchase of a conical flask, and the bits to make my stir plate soon followed.
My AG#3 I rehydrated the yeast as per the packet instructions and I had a good active fermentation , yeasties flying around etc.
My last brew AG#4 , I rehydrated the yeast and aerated using my magnetic stir plate,this brew which used the same yeast type as AG#3 danstar Notts started to ferment rapidly ,brown peaks hitting top of the inside of the FV lid and trying to escape through the airlock like a 50's B movie!
From my limited experience , rehydrating the yeast certainly appears to improve it's
performance.
BUT at the end of the day it's all about choice and we as brewers have a lot of choice, kits, extract,BIAB etc.I think that is all part of the attraction of this fantastic hobby.
We all have one common goal.......BEER!
Also Aleman doesn't just have a picture of master yoda because he's fond of star wars if you get my hint