I think you've mistaken thousands of years for millions.
As per your own link:
Solving for z_rec gives value around 1100, which converts to a cosmic time value around 400,000 yearsI think you've mistaken thousands of years for millions.
As per your own link:
Solving for z_rec gives value around 1100, which converts to a cosmic time value around 400,000 years
Doh. Thanks.
If it makes you feel any better I had the same exact reaction as you and almost posted the same thing, but managed to catch my error just in time.