Earlier quoted context omitted.
Note that the genesis block is block _#0_, not block #1 When Bitcoin was publicly released, only the genesis block existed, so every block after that point could have been mined by anyone.
Block #0 has a timestamp of 2009-01-03 18:15:05 Block #1 has a timestamp of 2009-01-09 02:54:25 So, does this mean there were 6 days separating the first block in the chain and the first block to be mined? https://blockchain.info/block/000000000019d6689c085ae165831e... https://blockchain.info/block/00000000839a8e6886ab5951d76f41...
Since the genesis block is hardcoded in the software, what likely happened is Satoshi generated it in advance, added it to the code, and then did a few more days of final testing prior to release. Block #1 on the other hand was mined after the initial announcement on the cryptography mailing list: http://www.metzdowd.com/pipermail/cryptography/2009-January/... (about seven or eight hours after if I got my timezone conversions correct)