Lets look at it logically. The whole reason why your performing water changes is to drop the levels - that are of a normal chain of events within any given cycle to begin with. Adding something live to the equation to early is the whole reason for the concern am i not mistaken?.
If people just waited till their tank was cycled as nature intended, then half the known issues most people experience from the start are eliminated.
It cant be just me that see's this perspective surely. It also cant be just me that see's we dont need to use anything living to achieve it ether, when there is countless ways to produce the same results without subjecting anything to unnecessary cruelty.
Im no tree hugging hippy ether let me assure you, it purely just defies simple logic.
I also dont contest any percentage of wastes will eventually produce the same results as your suggesting, that is a mathematical certainty.
What im saying is bacteria by their very nature push to outer limits of their own sustainability constantly, only then once the abundant food source diminishes do they deploy what-ever adaptive means of survival, dormancy or cellular death. Having healthy bacterial numbers at the point of recession corresponding with the point we introduce our own constituent load (aka aquatic pets) then the system by logic, is able to convert close to the equivalent load potential it had during the heights of intial cycle.
Now, once again, dont know if its just me, however dilution of the food source when im trying to establish the best means possible to combat whats to come, just doesn't make sense ether. Your creating a ripple effect that can clearly be seen by testers of their systems. So.... my suggestions are to make it nice & juicy by what ever non lethal means, grab a coke & a smile, then after your in the clear by testing zero's across the board, then by all means, rush to the nearest LFS & impulse buy away if thats your thing.
Ok, so im done. & Yes, we kinda got alittle side tracked in relation to the actual thread, however it still doesn't down play a concept that seems to be widely practised. Lets just acknowledge that & focus on the thread topic as you suggested.