Hi Gijs,
Without a doubt this post belongs on a boring Waterproof Technology thread that covers the empirical methods, sampling requirements, and proper statistical procedures needed to reach valid conclusions about product quality. Sorry to bite your head off here,
but based on previous so-called "tests" of Leica binoculars, Allbinos is simply not qualified to do such work in a meaningful way, and I would certainly hate to see Leica's reputation again be placed at the mercy of this perhaps well-meaning, but definitely amateur outfit. I'd be happy to pontificate at greater length elsewhere, but the good news is that there are qualified, independent companies that could do the work to professional standards, — although it would be very costly and require Leica's cooperation in several ways.
Regards,
Ed