Cameron has suggested that a <15% turnout nationally for the PCC elections is expected for a new position, saying that elections for a first time postion were "always going to be low" in turnout. Let's just look at how history relates to that remark...
In 1979 the first EU Parliament elections took place, with a turn out of 32% held soon after a general election with 76% turnout. This first time national election, for a body that wouldn't actually do anything internally to the UK, managed to attract almost a third of voters, and just under half of the normal voters in a general election.
In 2000 the London Mayor was elected, for the first time, and got a turnout of 34% while only a year later the general election turn out would be less than twice that at 59%.
And then we have another "first time position", the Bristol Mayor, who was elected at the same time as the PCCs were and yet got a 29% turnout, this two years after a general election with a turnout of 65%. Indeed PCC turnout appears to have been higher in Bristol than nationally solely because of the turnout for this other new position!
For the PCC elections to be at such a low turnout is far below being the norm for first time elections for new positions, to be around half the usual popularity for voting for such a new role (with a much greater amount of spoilt ballots) shows that this is not just a "slow start" or similar for a new role, it is a protest by the electorate, and a REJECTION by the people of the UK for a role that has no place in this country.