It took almost 2 years just to get to the 10,000 BTC = 1 pizza stage.
Bitcoin was released in 2009. I got onboard in mid-2010 and the price at that time was more like 100 BTC per pizza (Here, 1 pizza is around 5 euros).
Correction: It was two pizzas, so 5000 per pizza at about $12.50 per pizza.
The date was May 22, 2010.
The genesis block was January 3, 2009.
That is 17 months.
The price subsequently increased rapidly in 2010, as recounted at the history page (linked below).
The point being after 17 months it was still 10000 BTC = $25 i.e. 1 BTC = $0.0025 (and was 18% mined). That is a very long time by today's standards. Almost (but not quite) literally a premine in the sense that it was 18% mined before it was used for anything.
Sources:
https://bitcointalk.org/index.php?topic=137.msg1195#msg1195https://en.bitcoin.it/wiki/History#2010