Gas cooking has long been recognized as superior to electric when considering the control you have in the heat input to the product. In order to debate the merits of induction over gas one must use the technology properly. If you use induction properly, objectively compare the pro's and con's of gas and induction, you will become an advocate for induction. Unless you eat pasta every meal, the comparisons of how fast water boils is not the most important consideration. When using a 3500 watt induction unit, which can be found on most residential cook tops today, induction boils water considerably faster than a 16,000 BTU/hr gas burner which is typical for the residential gas cook top. At the end of the day the use of compatible cookware is the only real requirement for induction cooking to excel over gas.
In my opinion, the most compelling reason not to use gas has not been mentioned in any of the previous posts. Gas consumes oxygen and gives off toxic byproducts which you breathe. Lung disorders have been attributed to using gas stoves. Just search the net for health concerns related to the use of gas. As an asthmatic, I have found the I am even affected by the pilot light in our gas fireplace.