Most of the ones I saw were short.
However, take that last one as an example. It's a committee report, saying "The majority suggests that the bill will be passed unchanged."
Here's a longer one: http://www.althingi.is/altext/142/s/0015.html . "Bill amending Act no. 74/2012 on fishing fees."
Next question - how long are they in other governments? For example, the recent US "Freedom to Fish" [in the 'waters downstream of a dam'] Act is only two pages.