A mind learns by taking in information through various sensory organs, and processing that information. Different minds learn at different rates, and more complex information requires more time and effort to process. Thus, even if raw information is telepathically injected into a mind’s memory somehow, the mind still needs time to digest and assimilate the information, and will not be immediately able to use the information well; this is especially true with information on skills that require subconscious muscle memory of any kind. Nevertheless, telepathic information exchange is one of the more efficient ways of learning.
Added this to section 2.1.1 of the Codex.