Addendum, picking this from Wikipedia:
Rankings, Awards, and Recognitions
In 2018, Arthur D. Little was rated #10 and #9 in Vault's 2018 Consulting rankings for Asia and Europe respectively.
ADL recently re-established itself the US market and has been recognized by Forbes in 2016, 2017, and 2018 as one of "America's Best Management Consulting Firms"  and made its debut as #34 in Vault's 2017 North America Consulting rankings.
On Vault's global rankings of key employment factors, ADL was ranked #7 for firm culture, #9 for international opportunities, and #13 for relationship with supervisors.
=> looks like my hypothesis above may be right, the company might very well be a hidden gem. Prepare for it like you would any strategy consultancy.