I've worked formal 3 and 4 day week arrangements. Net experience: it's pointless, if you're working 4 day weeks and you're feeling behind, you may well end up working that 5th day without anyone asking.
Similarly in a 5 day week arrangement, I've never felt compelled to actually work the full week especially when I'm ahead.
Ignoring any formality, I think most folk work a 2-3 week if they were honest about it.
I wouldn't sweat having a 3/4 day arrangement as a reason to pick one company over another, especially if the offer is implicitly part of attempting to screw you on salary
Similarly in a 5 day week arrangement, I've never felt compelled to actually work the full week especially when I'm ahead.
Ignoring any formality, I think most folk work a 2-3 week if they were honest about it.
I wouldn't sweat having a 3/4 day arrangement as a reason to pick one company over another, especially if the offer is implicitly part of attempting to screw you on salary