Well let's look out next week and report back. Just to be clear - do you want to stand by your claim that 60% of headphone users on trains and buses are using wireless headphones of some kind?
Results so far - from an InterCity-type train journey at the weekend between two cities in Western Europe...
Wired headphones: 26
Wireless headphones (large, over-ear-plus-headband style): 3 (*)
Wireless headphones (in ear, earpod style): 0 (#)
(*): This may be overcounted - I thought I saw one more, but when the wearer moved their head a cable came into view. Others may also have been wired.
(#): It is possible that some people with long hair or headscarves were using earpod style headphones - if you can't see someone's ears, this type is invisible. However, you can see most people's ears.
I will be travelling quite a lot this week, and will report back.