Have a look at
http://www.threepeaksrace.org.uk/FullSplitResults09.pdf and Brian Fogarty in 55th place.
Brian was on his first ever PPP, in fact his first race over HM distance - he was a 35 minute 10K road runner who fancied something different and did exceptionally well.
His splits would probably be good targets as he set off steady and worked his way through.