Most sharks do have a long juvenile period prior to being sexually mature. The 14 years for the male white shark you mention seems a bit longer than mako, but could be within the range of natural variation.

Finally, sharks are slow to reproduce, but they are repeat spawners and do not die after reproduction. In smaller shark species, the cycle is thought to be annual, but for larger sharks such as whites and makos, most people believe the breeding cycle may be once every two to three years.

Here's a photo of a cute baby blue shark that we caught and released on a recent tagging expedition off the coast of San DIego, CA.