No citation possible, because the data is encrypted. What is measurable is the delayed startup. Of course they can send the data later, but that's not what is measured.
Not saying that they don't send data at startup (but it is more likely that it will be delayed by around a minute or two), but not acknowledging that dumb (OLED/LCD) televisions' faster boot times is simply due to having literally fewer functions is missing the bush. Even well-optimized embedded Linux still takes around 5 seconds to boot to init whereas dumb TVs are already (usually) finished in 3 seconds.