Toyota calculated that hybrids were just as green as EVs, and they believed most markets would need hybrids for a long time before being able to move entirely to EVs. End-of-life carbon emission studies all conclude that EVs are significantly better than hybrids now and even much more so when energy comes from renewables.
The adoption rate of EVs seems good, but less than what other countries have done, and it is less than some may have expected, given the government subsidies, yet the S-curve of adoption typically has a long trail of slow adoption until 10-20% of the market is saturated. Once it gets there, usually prices drop and the market matures to support mass adoption. Right now, only 6% of new car sales are EVs, and only 1% of cars on the road are electric, so we are far away from seeing a consumer driven leap in demand/sales, IMO.