http://paercom.net/downloads/files/Full-Report.pdf

*Excerpts:*

The overall results from the range voting variation closely approximated
those of the approval
vote, at least in terms of the order of favorability.  The Green Party
received the most points, totaling
68.88% of the total possible, followed by Independent candidates 59.9%, the
Socialist Party 58.51%,
the Democratic Party 51.01%, the Libertarian Party 34.17%, and the
Republican Party at 12.31%.  
7mong write-ins, many cast their ballots for some variation of “none” among
other miscellaneous
options, respectively totaling 4.81% and 6.39%  of the total points
possible.

Under the instant runoff method, also known as ranked choice, voters rank
candidates in order
of their favorability.  In our model, participants were asked to rank their
top three choices in order of
preference.  The instant runoff test was the only alternative method in
which the winner of the plurality
vote was among the top two vote-getters.  Though the Democratic Party
received the largest amount of
top choice votes, the Green Party came out in first place after the final
elimination round.  As in the
range voting test, 208 individuals participated in the instant runoff
simulation.

...

IRV Tally.  Of the methods we tested, the Instant Runoff Vote is the most
difficult to tally.  
Because we did not have sufficient time or resources to create a program to
automatically tally the IRV
results, and because we were wary of employing the available online
tallying software, the results were
tallied by hand.  In future we would prefer to tally these results by hand
and test them against an automatic electronic tally.