Is it really possible to process 10 images in 3mins using just Lightroom? In short yes, totally possible...
Lightroom has a really cool built-in feature in the Develop module called sync.
It makes is super fast to sync your develop settings across many images.
And if those images happen to be very similar you'll find that's all the adjustment they will need.
If some of the images are slightly different you will have to do some quick adjusting to the exposure, highlights, and shadows to balance the histogram and finish them off and that's where the Ultimate Lightroom Workflow kicks in and makes those minor adjustments super fast and easy.
Watch the video below and see how easy it is to smash through a photo shoot, without having to make adjustments to every image.