This is probably an educated guess and the closest thing to an accurate overview you can find, (from your article):
The many tribes that inhabited Arabia had diverse customs and cultures, in some, women had low status and were not much better than livestock, in others women enjoyed much freedom and independence which was curbed by the imposition of Islamic laws. At one time most Arab tribes would have been matrilineal, an incident in the ?Sirat? sheds some light: two men questioned about their identity say to the Muslims: ?we do not follow our mother?s line and disown our father.? This indicates that even in the time of Mohammad there would have existed matrilineal tribes.
Another incident in the ?Sirat? (Pg. 59 ) tells us of a woman by the name of Salma d. ?Amr. On account of the high position she held among her people she would marry on condition that she should retain control of her own affairs. If she disliked a man, she left him. She had a son with Hashim -Hashim was Mohammad's great-grandfather - and Hashim left him with Salma while he was a little boy. It seems that at least some women did have control of their own affairs which included the right to divorce.
Also, I would have to point out that in Islamic sources we have seen female leaders and famous businesswomen-we rarely see it after Islam for another few hundred years, also, the influence women had in Quraish seems to dissappear in the years after.
If there was a lot of female infanticide it would have created a problem for the men, the problem would have been solved by polyandry-yet Muhammad never allowed polyandry, instead many men had multiple wives. This would have been impossible if female infanticide was as prevalent as it was exaggerated to have been by Muslim propaganda.
It's only speculation and the signs are there, but we can't have much definitive proof.
We do at least know that most of what is written in Muslim sources is false.