WX150 Zoom Speed
Mine is the same way. Zoom starts out slow so you can fine adjust. Then takes off super fast. It is like the programmers thought "10X is SO FAR, we have to provide super high speed boost." It is really is annoying. Definitely the worst thought out feature in the WX150. Cameras with much longer zoom ranges simply have a single medium fast zoom speed and they are much easier to use.
Otherwise I really enjoy using the camera. Because of its light weight I put it it a cell phone case, clip it to my waist and go jogging with it, typically 30 to 40 miles a week. It has about 1000 miles on it now. All the jostling and bumps seem not to have damaged it in any way.