How long it takes for a Mendeley Data repository review?
Mendeley Data moderated and accepted all 6 datasets, in between 2 and 3* days since submission. 


I can't say when exactly it was as I received no email confirmation and I've checked last time the status of datasets 2 days after submission. Also, looking on the Mendeley Data UI, I can't find any clue about when it was approved. 


However, 3 days is very good in my opinion :)

Hope this info will help someone else :).
Live long and prosper!