Wow, didn't expect to see myself referenced by name on here! Someone throwing down a gauntlet?
I am Thomas Bartman, a.k.a. tbartman. My PB 10k right now is the 39:49.4 you refer to. I did that about a month ago. Interestingly, I am one of those people whose times you might find strange (and I've written here before for advice). Following Paul's Law (or looking at my percentage in the standings), I do much better at the shorter distances than the long. For example, that 10k at 39:49.4 puts me in the top 38% for 40-49 Hwt men, but last night I set a new PB in the 2k (7:00.8), which is in the top 15%. (D**m that 0.8 seconds)
Looking across my times, I get much slower than I'm supposed to as the distances/times increase (or alternately I do much better on shorter distances than my long distance times would predict).
Anyway, I'm using the C2 UK training program, and looking for about 6:52 by the end of January. My most previous 2k was 7:09.9 in April, although I didn't start the TP until the end of July. So, in a touch over 3 months, I've dropped 9 seconds, and I'd like to drop another 9 in the next 3 months. I may be shooting for too much, but I think my erg gives me slower scores (I'll start a new thread on that in the Product catagory).
BTW, I don't see you in the rankings just behind me (even when I look at all men, all weights).