In Salisbury Review Dalrymple expands on his recent conversation about college students with a taxi driver:

I asked him what the town was like, whether – for example – it was quiet.
‘When the students are away,’ he said.
‘And when they’re here?’
‘It’s different.’
‘Are they nice, the students?’
‘They’re evil bastards.’
…
‘They can’t all be like that,’ I said.
‘About seventy per cent of them.’