By "relevant source", i meant what Satoshi said publicly or what Satoshi said to other people in private. Nevertheless, your deduction and mentioned source makes sense and i find it's plausible.
Also the bitcoin wiki about the Genesis block
https://en.bitcoin.it/wiki/Genesis_block mentions this:
The Times 03/Jan/2009 Chancellor on brink of second bailout for banksThis was probably intended as proof that the block was created on or after January 3, 2009, as well as a comment on the instability caused by fractional-reserve banking.