The Magnum effect and Screw cap ?

As someone who has had very limited exposure to magnums, and even larger formats, can I ask a rather simple question. Is corked wine found as frequently in magnums and above as it is in bottles?

As in TCA? Then yes? But in terms of inconsistent closure (i.e. less protection), the magnum format mitigates it a tiny bit because of the volume of liquid, but for sure the differences are noticeable.
 
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