If he hears one sample, he immediately rejects the piece because the sounds are so overused in production music.
That sounds a bit drastic to me, honestly. I mean, sure, I've recognized loops or patches in many production pieces but that doesn't mean it was poor or sloppy work. Take, for example, some of the music from Bastion where composer Darren Korb used some Apple loops but then intentionally made some of them looping point lopsided. On other tracks he created original material around those loops. Here's one such example:
It created a completely new and cool feel! Loops by themselves are not bad - it's how you use them.