The British Way?

Overheard an 'English' accent today from a couple, I got really excited and walked over.

'Well that's accent I don't hear everyday, where are you guys from?!'
'England. We're on holiday here.'
They then gave a curt nod and walked away.

That's awkward.

1 of 3 options here..

1. They didn't get that I was also English. (Which isn't a possibility because though initially I struggled with 'The Twang', I've been fighting hard, and now sound right as rain.)

2. I've assimilated to the Californian way and expect everyone to talk freely. I've had so many conversations here with randomers that I've embraced it. I embraced it in England too, just didn't happen as often there.

3. Most likely option: Stiff upper lip syndrome. They were being typically English, and therefore assumed that as a result of my approaching their space I was likely to kill/threaten/embarrass/hassle/beg or all of the above.
Heaven forbid we have a short chinwag and then cheerfully part ways, joyful in the glow of  fellow human interaction.

Goodness, whatever was I thinking?