In reply to steveriley:
Just like I (and the OP) don't expect/want people to hammer past riders on blues and easy reds, I wouldn't expect riders to pootle down blacks. irrespective of whether they think they can get out the way.
Sure, they aren't particularly tough blacks at Llandegela, but it is easy to get 30mph + on a MTB on them and you shouldn't be expecting to encountering a cross-bike rider picking their way down, whether you can pull over or not. Unless you are in fact Chris Akrigg (and others like him etc) of course; in which case, I'll get my coat.
But yes, mid-week is better if you 'have' to do it.
And looking down your nose at that 'demographic' who are stopping and having a chat about the fun bits? It's not about the total lap time for us 'lot' - it's why Enduro racing was invented! ..... Total lap times are for the XC brigade.