I can only PRESUME that she is officially Queen, she is always in the lists of UK rulers after Edward and before Mary. Northumberland proclaimed her Queen and she was officially proclaimed Queen to the people of London on 10 th July. She lodged in the Tower prior to her coronation and The Marquess of Winchester placed the crown on her head in the State Apartments, so I guess she was "crowned".
Do you think that the name Jane would be avoided by future royals? I remember reading somewhere that Richard is on the "names to be avoided"list

I would like to think that had Jane remained Queen she would have quietly put her extremely abusive parents out to pasture somewhere but that is wishful thinking on my part.
Off topic, but while I was looking through one of my books I found this statement; One of Northumberland's sons stated in a letter that, Edward (VI) was buried privately in a paddock adjoining the Palace of Greenwich. Northumberland then substituted a "look-a-like", who had been murdered, to be seen by the people, this look-a-like was then buried in the altar tomb of the Henry VII Chapel. If this is to be believed my heart goes out to Jane, she never stood a chance against the utterly ruthless and vile Northumberland.