I've been using this trick for some time (for different reason though: without it I've had the watchdog triggering reboots sometime during large file transfer to mmc)

About ramzez :
After 1 week of use (with 30% setting), I'm not sure anymore that it really makes a difference. Let's say that my first report was caused by "placebo effect" or by a reboot just before testing.

Maybe someone with 2 devices could do some side by side tests ?