Do you have an example page?
100 images are pretty much, i think. Normally JQM runs pretty smooth with some tricks, except the normal "Button click" leak in mobile browsers. It depends on how you load the page into the DOM. If you are fully loading the whole page in advance with 100+ images, then you can`t expect it to be fast.
For smoother listviews:
The link tags are responsible for the stucking, so try to remove all the a tags from your list and see if its scrolling smoother. If it does, just add a "click tap" event handling to the list items in cooperation with $.mobile.changePage to get your list items linked again. Just leave out the a tags. That works for me.
Peace