3fordasho,
Leaving them in round format works real nice for elm.
I've left a few other types by accident and they improve also.
I think any wood that is pretty wet per weight will enjoy the slow cure method.
I cut mostly at 12" so everything cures for me at nearly the same rate, my 16" length wood is a bit different.
Nicer splitting elm after the rounds are sitting for a while, and up to around 3' rounds i find are curing nearly the same as split stuff so not a giant wait after splitting the rounds and they are ready anyway.
Just make sure the rounds are in a place you would normally cure wood and in similar conditions and i think you will be impressed with any elm cured that way.
Watch for the big rounds beyond 3' they tend to stay wet in the middle and can mould so noodle bigger than 3'.
Cured for a year in round format i rate even American elm way up with the best.
Split green and stacked then cured it's just ok wood.
You will have to find a barkless rock elm one day, much like burning coal