Is a Dictionary implemented as a linked list in VBA?

[Visisthebest]

Reading this article:
https://nolongerset.com/vba-collections-aka-linked-lists/

They speculate but aren't sure about the answer to this question: Is a Dictionary implemented as a linked list in VBA?

I am asking because of the performance implications.

And of course, how do they work in a Visio add-in? Does .NET do it differently, does it add optimizations?