Hi Sean. I would have to say this is coming from A 50mm f1.2 that it does high light source really well in the bokeh department.
Last time I received an email from Jonas was still about rumination of bokeh quality and I paid him respect for his relentless pursuit of bokeh analysis in which it is subjected to personal preference and background matters. He is now paying a lot of attention into foreground bokeh and making up his mind on Voigtlander 58mm f1.4 in which I am waiting for its arrival to my doorstep.
I can add a few bokeh shots from my Canon L prime lens bokeh. In general, Canon bokeh tends to be lower contrast (that I had to enhance them myself) but handle the highlight source quite well in the bokeh. My favorite primes in the L line up are 24/1.4L 50/1.2L and 85/1.2L
24/1.4L
50/1.2L
85/1.2L
With the pentax lenses,
DFA 100 macro - bokeh prone to clipping
Fa 31 Ltd handles highlight bokeh better than other Fa ltd
A* 200mm macro - handles light source and foreground poorly
Fa 77 ltd is an all round lens with bokeh
Fa 43 bokeh is so so
Fa* 300/4.5 + Fa* 80-200 do well with green background bokeh only
A 50 f1.2 is an all round lens with pleasing bokeh and I personally think this lens beats Canon 50/1.2 easily in the optical department. Jonas aggreed with that too.
A* 300/2.8 bokeh is just purely creamy and nice but the subject focus is always an issue.
These are just my ramblings.