Also many electric bike riders don't take the extra power into consideration when they speed down those bike lanes. I overheard a conversation at the office recently where the topic was the number of bike deaths this year (I work/live in Manhattan) and they did point out that many of those might actually be electric bike riders.

They're not. You can find the full details on each and every cyclist fatality in the city from news reports and such, and e-bikes are a small minority of deaths.

It's more complicated than that. Pedal-assist e-bikes are now legal, but throttle-control e-bikes still aren't (although in theory they're supposed to be legalized soon). The latter constitutes the vast majority of e-bikes on the streets here.