If anything, they would certainly... or at least hopefully, be aware of either the exact time this Cybertron's been around, or, as you say, could given an educated guess.

[Pausing, Jetfire frowns thoughtfully.]

After that, access to space, or equipment to calculate the age of this universe would be required to establish how much time has passed in this reality, compared with any other given one...

[The idea is rather facinating, really.]