No I'm sorry but this is simply not true. on2 dancers have no greater propensity towards musical understanding than anyone else. in that I even include genuine mambo dancers as well as ET.
I strongly doubt a random sample of the world's dancers on different timings would show any significant imbalance of musical knowledge. It's natural to step on2 if that's all you are shown.
Further mike bello suggested on1 songs night lack the tumbao? I'm not sure how that would actually be salsa?
it's not propensity. it's necessity, or rather, almost a necessity.
I think we, by far, as semi-pro dancers (truth be told that's what we are) forget that, by far, we are the minority. For every trained dancer's social there are 10 packed Latin venues with people dancing salsa; 30+ house parties, 100 people in the shower, and so on. When people are left to their own devices and learn to dance salsa on their own, or from a family member, or by imitation, they almost always end up dancing on1 or on3.
Most people innately feel the pulse of the music: the downbeat. So a lot of times if you can feel the phrasing of the music, the 1 sets you up to get started. Since you don't really start on the 1, you start to dance on the next downbeat, which is the 3. This is precisely one of the reasons it is a little easier to Learn on1. Hence why on1 is more popular.
Now you might go to one of these venues and find an on1 dancer. You go ask the simplest question about numbers and he/she might even laugh at you. But when you ask an on2 dancer there you will more than likely get a serious response. Even if it is the wrong answer, there is at least awareness of the structure of the song. To learn on2, there is a bare minimum you need to know in order to train your ears and get the timing. This is sometimes enough for the individual to become curious enough to learn more. it has nothing to do with propensity or one being a better dancer than the other. it's just a reality.
Now, this is all based on experience, anecdotes, logic, and probably some fiction. Nevertheless, all of that forms the perception in the salsa world and you will find countless threads in these forum validating the existence of this perception, some of which are recent. If you want a survey/statistics, which we both know is not happening, then you'll have to ask one for the countless perceptions in the salsa world which we all discuss constantly here. It is not a fair request/argument is what I'm getting at.
This is all somewhat off-topic and I do not want this to become a timing war (as usual). So I'll agree to disagree if a disagreement still exists.
On the tumbao question, I cannot speak for Mike Bello and I did say he just gave a quick word on the subject so I hope we don't crucify him, for my sake. But yes there are other patterns other than tumbao. is it salsa? you tell me.