No not really, because on day one it used to leave your account, day 2-3 it used to go missing and day 4 turn up in the recipients account.
In these 2 missing days, banks were using this money to lend. However it never really existed, but when they changed it to 1-2 day transfer they had to find all this money that didn't exist.
Don't get me wrong this is some complicated sh1t, I have thought about it 10 times and changed my mind 5 times.
Well beyond me, I'm off for a coffe before I return to start arguing tohe point against what the guy said