Iago nods to acknowledge the toast and has a little himself. Less, though, he still needs to run things.
"It's an old wound that's been in need of resetting," Iago says noncommittally, then, "Aye, and I know well that's not an answer. 'tis also a habit of his to overextend himself as his first resort." Slightly meaningful glance.
"A few days before most. You seem to be lingering long, though; think you 'tis a permanent youthening?"