For a universe presently dominated by static or dynamic vacuum energy , cosmological constant ( LCDM ) or quintessence ( QCDM ) , we calculate the asymptotic collapsed mass fraction as function of the present ratio of vacuum energy to clustered mass , \Omega _ { Q 0 } / \Omega _ { m 0 } .
Identifying these collapsed fractions as anthropic probabilities , we find the present ratio \Omega _ { Q 0 } / \Omega _ { m 0 } \sim 2 to be reasonably likely in LCDM , and very likely in QCDM .