I'm a bit wary about the idea of a DUP + Tory agreement, because the DUP must know that the Tory position on Brexit is a huge threat to the stability and peace in Northern Ireland, and a hard border with the Irish Republic would be disastrous.
The DUP want a hard border with the Irish Republic. They specifically don't want any special status for Northern Ireland as they're afraid it would bring Ireland and Northern Ireland closer together.
I think the voting reflects the general uncertainty about the Brexit process, plus some of the under 30s actually getting out of bed this time...
http://www2.politicalbetting.com/index.php/archives/2017/06/...
I actually saw queues outside polling stations yesterday.