Rubbish. You only need to encrypt secure information. SSL sites are slower because EVERYTHING has to be encrypted. Google favouring them??? Got my doubts about that. Since when did Google favour security over content? In any event, you should make a site for visitors, not Google.
I see a lot of sites now using SSL when they don't need to, Google for example and even this forum. I suspect the reason they do so is because it's easier to make the WHOLE site SSL rather than just the secure areas (I've implemented SSL properly on a site of my own before). Laziness and a lack of technical ability being to blame.
Minimum standard? Bullshit. Please do not post such misleading information, some people might believe it.
Well if you are going to be
pedantic why even bother with secure website (its
TLS not SSL, you fool) - not your card details... as long as you receive them at the other end you can process. The reason why you have this is for
trust. Obviously in certain cases its a legal requirement such as financial institutions.
Secure websites are
not necessarily any slower than a non-secure website. It has to be encrypted yes, but depends on the hardware and setup... many secure websites are much faster than poorly (typically oversold) non-secure websites. There is still always the bottleneck regarding script processing, database queries and the like.
Google doesn't favour security over content, having a secure website wont get you up the top of the SERPs. Google does factor it in though, but if its shared hosting the penalty for a slower website will outweigh any positives by having a secure website with signed certificate.
YOU ARE MAKING A SITE FOR VISITORS, NOT GOOGLE!
The reason why an ecommerce website should be a secure website is to bring
trust for your web visitors. Google has decided to award secure websites some points... to encourage
quality amongst websites. Page speed and trust has zero factor to content; but its important factors to the end user... no one wants a slow loading website or a website that doesn't respect their privacy or security.