For sheer likelihood of having a stranger chat to you at the bus stop, in a shop, when you move into a new house... then very generally, having lived in several places in both Ireland and UK, I'd say yes.
Northern England is chattier to randomers than Southern England, though parts of southwest England are at a northern level of chattiness. Rural England is chattier than urban England, though not always (see above re north/south divide). Scotland is chattier than England as a whole, but big variations again. Rural Scotland is chattier than urban Scotland but then it also depends which bit or urban Scotland you're in (Glasgow is chattier than Edinburgh, for instance).
But nowhere seems to be as chatty as Ireland, comparing like with like. Rural Ireland is chattier than rural England/Scotland, Dublin is chattier to randomers than any UK urban area I've been in (though Glasgow comes close).
YMMV of course... now cue the outrage from people who will accuse you of racism/goadiness/whatever for even raising the question 