The bit of being digital that is set in stone from age three is the absolute awareness that being connected aids their learning, and that connectedness is highly visual and aural, as well as being textual, and includes connection with people as well as information. They have probably also internalised that they can interact creatively with the digital environment and everything in it, to aid their learning.
Hence the comparison with learning to speak, in that it is messy, diverse, involves a lot of trial and error and has concepts built and rebuilt from a multitude of influences.
Mal Lee and Roger Broadie discuss the relationship between infants and the digital world. One of the points that they make is that, by three, children brought up in digital environments will be largely directing their own learning with the digital. This raises so many questions for me, such as what is lost in this transfer to swipping on a tablet and talking to search engines, as well as who or what the children are actually connecting with? It is interesting to think about this in regards to Google’s ‘selfish ledger’.