It doesn't say how much bigger.
My point I'm trying to make: the original comment indicates to me that we need to worry. For me it conveys much more speculation than I think is reasonable right now.
For example they were also not expecting to have such a great optical resolution.
It does indicate something. It indicates that
> they weren't expecting this to happen so soon after the launch
The delta matters, but no matter the delta, the fact that it defied expectation stands.
For example: https://solarsystem.nasa.gov/stardust/home/index.html
There are other points were stones collect like l4 and l5.
Then we have Hubble (and over 100 others as a benchmark, a few ships/missions like to the moon and Mars.
Herschel space observatory was also on l2. There is a wiki Artikel called 'list of objects at langrange points'