never heard that
I have used the holy sh*t out of my Duet and not one problem.
I have at4040, superlux ch8c, c 414, ev cardinal, c 3000, ksm 44, tlm 103,
never an issue with any of those condensers.
What I really like about it is that I can set it to instrument or mic line in, that was the selling point for me, I can run my api and neve pres through it.
It also works great with my zoom h4 and emu 0404 usb as an aggregate device giving me more ins and outs.
It's just fun.
"OH! There's air in my Hi Hat! I like that very much!