Each prepost market will be different depending on who frames the markets.

Some papers are framed by journalists other more advanced markets are actually framed by bookmakers.

You're quite right on the market percentage Umrum - some markets are not an accurate reflection at all.

However, in general the firmers win more races than the drifters, BUT you might like to check out the drifters for value as opposed to strike rate.

I don't keep stats on prepost, but a few years ago I used to back the drifters under 10/1 in running doubles with some success, but constant changes in the authors of the markets meant inconsistency.

Many times a journo would be on holidays etc and the market wuld be framed by someone else unknown to the punter.

I think Winline GTS contains SP figures and prepost figures, so perhaps Bhagwan could shed some light?