Yes, 'tis true.
It really depends on how well the particular ILS installation is engineered.
Example.
Yeras ago, it was common practise to have ATC inform the flight to intercept the R25L localizer at KLAX at 100 miles.
Did this work?
Actually, quite well indeed.
In fact, I flew into KLAX not all that long ago, and the exact same instructions were received.
So much for max 24 miles....
