I mean so-called third world countries like India, Bangladesh, Pakistan, Indonesia, Thailand (?), as well as developed nations such as UK and Israel have had elected female leadership.
22right, you're right in stating that many of the poorer, third-world and even Islamic nations have had women as their elected leaders (India, Bangladesh, Pakistan, Sri Lanka, the Philippines, Turkey, Indonesia, Israel, Burundi, Guyana, Nicaragua, Rwanda). However, you must keep in mind that most of these women, though legitimately elected, inherited a political legacy from their husbands or fathers.
There are, of course, Western countries where women have been elected to the highest office. These include Britain, France, Canada, Ireland, Portugal, Poland, Finland etc. In these cases, far more often than not, the women made it to the top largely without familial political ties.
Of course, whetever the situation, the fact remains that women have made it to the political top in countries as dissimilar as France and Indonesia, but haven't quite managed to get there in America.
If you want true woman power though, look to New Zealand. They were the first country in the world to give women the vote. And today, the Sovereign, Governor-General, Prime Minister, Leader of the Opposition and the Chief Justice are all women!