oh crap 
The opening line at the race briefing was
"Good afternoon Ladies and Gentleman, welcome to Ironman Wales, the toughest Ironman in the world"
It definitely was ... it chilled my spine then and while the Bike looked not as bad as I thought (apart from between Narberth and Tenby), I have a beautiful DNF to my name.
I personally think that it is the weather conditions that make it that extra hard. Tough bike and run and it is a bit chillier than you expect which can top that extra edge you think you might have.
I am so looking forward to next year ... I just dont do quitting