@md2002 mentioned a few months ago he had tapered down to just taking it once a week (1mg), and hasn't noticed any difference.
Theoretically if people are saying finasteride's half life is 30 days in the tissue, then there could still be some left in the tissue if you left 60 days between doses, but that must be kind of pushing it to the max, as if you flick through past forum posts there are plenty of people who have induced a shed (3 months later) after taking a break for a month or two.
I think there is too many variables in play to draw a one size fits all conclusion, but people are probably taking more than they need to.