I can't think of a reason that they'd take up different quantities of water. I'd think the boiling water would just cause the same amount of loss, but quicker since its hotter so it hydrates the hop leaves faster.
dry hop soaks em up slower, but since they sit a lot longer than 60 minutes, should still soak up their max amount.
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10