Computurd,

You may test your "thoughts" on this but you have already been given the answer to your question.
There is only one way for an applicaiton to produce QD>1.
The answer is Multi Threading.

The reason to why an HDD shows higher QD is because it is slow compared to an SSD, it has nothing to to with the application unless the application is multi threaded.
The faster the storage the lower the QD. (for the same given task)