Hmm. I'll have to pull out BLAM again, been a while.
If you take what Lallemand says at face value:
"Our Abbaye strain was originally sourced from one of the trappist/monastery breweries in Belgium and is comparable to WLP500, giving the stone fruit/estery notes at higher gravity and fermentation temps and more 'earthy' notes at lower temps. Personally, I find it really comes into its own on darker styles with richer flavour but is suitable for the classic Belgian styles."
This makes sense given what we know about Chimay. Starts at 68, finishes in the mid to high 70s.