Apple was trying to come up with a way to prevent butt-dialing and other unwanted device actions. The point of using a sliding motion is that it's unlikely to happen via random touches, but is reasonably intutive.
Microsoft's video doesn't really show a slider. It shows touch buttons that look visually like sliders. But you can trip them just by touching in the active area for the desired state. This is shown in the video where the demonstrator runs their finger down a column of switches and they all switch. Apple requires an explicit "click and drag" operation to unlock.
From the video "having to use a sliding gesture makes the toggle slightly more difficult to use but greatly reduces the chances of inadvertently switching the toggle" As far as "not really showing a slider" You can't just touch them, you have to slide. When you runs her finger down a column, she is sliding her finger down the column. It is the sliding motion that triggers it. Not just contacting the on or off section. The sliding toggles require an explicit "click and drag" operation to toggle.