I really hate running into pallies in BGs, especially when they've got all of their CDs up and know how to use them - dear god they can be worse then rogues sometimes!
However...
My long neglected pally is the last toon I've got to level before the expansion so as noted on another thread, I've been taking my time and enjoying the process, so that includes doing the BGs for some solid gear to launch her into the expansion.
So I'm heading down the road that leads from stab to farm along the top of the cliff when I run into an enemy pally - I'm 56, he's 59 so technically he's got the edge, however, having had leveling issues I ultimately picked up goblin engineering, so her DPS capabilities are a tad higher then those of a ret pally of that level.
I think I can honestly say that the fight between us lasted at least five minutes - we both burned every CD in the book and then some, we both used pots, I managed to pop all of my trinkets and dropped several grenaids - it was great!
Amazingly enough, no one came by and interfered to boot - just two toons with a near infinite supply of health, mana and second chances going at each other fullbore, non-stop - for once it wasn't an excercise in frustration due to the fact that we both had the same outs.
I prevailed in the end - I'm pretty sure that this guy was also a ret pally, but he was extremely defensive - if he'd of judged or consecrated a few more times instead of healing himself and I didn't have the extra dps from the engineering, he'd of definately won.
None-the-less, it was still the longest and most fun instance of single combat I've ever experienced!