[Electro]

Three problems:

1) Wikipedia has far more information than a normal human, thus it would surpass human-level AI.

2) Compressing wikipedia into one persons mind would create a schizophrenic AI that's likely to kill people or die in a fit as its brain has an edit war.

3) It would take a human-level AI to first understand the information and then discard the useless crap and junk people post on wikipedia. I mean can you imagine asking an android what they think about Pamela Anderson's next divorce and having them randomly say "teh big boobs WOOT!1!11!"

Besides, information is redundant in intelligence. A cro-magnon would understand particle physics just as good as any one of us if they knew the information because they're intelligent.