This will be either my 7th or 8th year-in-a-row, and I have never found it to be, "just another gay pride week." What I have found it to be is an annual gathering of 150,000+ who seem like they are there to have a fun time. Keep in mind that Disney does not officially sanction or sponsor the gay week in their parks, but the vast majority of cast members are very welcoming. I think you will be quite surprised and impressed at the number of red shirts you will see in the parks (Animal Kingdom on Thursday, Hollywood Studios on Friday, Magic Kingdom on Saturday, and Epcot on Sunday). Now, to be honest, other than at the parks, I have not seen a huge crowd of lesbians during the week. If it is still in existence, "Girls In Wonderland" has been using the Sheraton as their host hotel. Gay Days, Inc. used to have a designated wing of their host hotel, The Doubletree at SeaWorld, for the ladies; but, they discontinued that a couple of years ago.
Bottom line: if you stick to the theme parks, you will be a part of a huge gay community and your lesbian friends will probably be content. But, most all of the pool parties and events I have attended elsewhere in Orlando tend to be vast majority gay. Your lesbian friends may not be as happy with those events.