Why not make a real experiment of it (if you have 2 of the same strain) and flush one thoroughly and on the second feed normally and after both dry and cure via the same method and decide for yourself ?
This, like most aspects of growing these weeds have many different ways to accomplish the same thing.
I myself can taste the difference between the smoke of flushed and not flushed. Some can, some can't, and some just have a personal preference.
These weeds store a certain amount of nutes and when you flush what you are actually doing is reducing that stored amount.
Some think this reduction produces a smoother smoke, some dont.
Long ago I did several side by side grows to test this. For my personal tastes I prefer flushed.
On some strains you may notice very little difference. On other strains you may notice a big difference.
But then again, that's IMHO and YMMV