There's been a pretty steady decline in the zeal most JWs (at least in my area) have for d2d. There are a few older ones that still act like they did when 1975 was coming, but for the most part anyone under 40 is just there to count time and make the morning as easy as possible.
When it comes to the "special campaign" stuff that they do for memorial, conventions and, apparently, the website - they're told to get in and out as quickly as possible, so in that case it comes from the top that they don't linger and talk to people.