http://www.ets.org/s/gre/pdf/gre_info_reg_bulletin.pdf
PG 25:
Not the actual test as I said earlier but:
GRE Diagnostic Service
Computer-based Tests only
grediagnostic.ets.org
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and have received an email notification that your official scores are
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you approximately 15 days after you take the test and for six months
following your test administration.