I leased a 2012 cayenne-red Nissan LEAF SL on 7 May 2012. I drove demos for ~600 miles before my LEAF came in 4 months after I ordered. LEAF Roper now has over 12,000 miles on it. I live in Blacksburg VA. I have a web page about LEAF Roper.
About 98% of the time I charge it using a Schneider charging station in our garage. I converted the portable EVSE to handle 240-volts and 16 amps. I had 240-volts receptacles at both of my daughter’s houses, one in Roanoke VA ~36 miles away.
Blacksburg currently has 9 level-2 public charging stations, 7 of which can be used at no cost. Roanoke has 2, 1 of which can be used at no cost, but the Mayor has told me that 2 more will soon be in place.
I previously owned a 2005 Prius and converted it to a Hymotion plug-in in 2009. My granddaughter now drives it. I have a web page about the Prius conversion.
Recently I converted our 2006 Toyota Highlander Hybrid to a Plug-In-Systems plug it. I have a web page about the Highlander conversion.
Also, I have an electric-assisted bicycle. I have a web page about the bicycle.
I forgot to mention that I drove a ZAP PK electric pickup from 2007 to 2010. I tried to convert it from lead-acid batteries to Li-ion batteries, but gave up and gave the ZAP away. I have a detailed web page about it.
It depends on how one defines “mass market”. If the current market penetration of hybrids is the definition, given that plug-ins (PIs) are moving into the market about twice as fast as hybrids did, I make the following estimate:
It has taken about a dozen years for hybrids to get where they are now, so it should take about 6 years for PIs to get to that point. However, the current fast rise in the price of oil (from ~$95 to ~$105 in the last month), the new 54.5 mpg regulation and the rapid progress in battery and EV technology, it might occur less than 6 years. I am looking forward to the options I will have in 2015 when my LEAF lease is up.