I have come to the conclusion that I hate website links to slideshows. As soon as I open one, I immediately click out. I just don't have that much time on my hands. (This is not to be confused with SlideShare, which does not have this issue.)
There isn't a website out there with this setup that doesn't hijack my device for 15 to 20 seconds PER slide. That's because each page has to keep loading up it's video and Flash advertisements before you can actually see the picture. Some sites are worse than others, but all sites are bad. The sites that allow you to see the list in a continuous feed are a blessing. They are the ones I mentally bookmark.
Lately, or maybe it's just mobile unfriendliness, but I don't think so, a lot of sites that have "spiffed" up their platforms have made the user experience worse.
Let's take Hootsuite for an example. Loading it now looks like this:
While it is still faster than those slideshow sites, it's buggy, and half the features don't work as well as they used to -- like the ability to like or retweet a tweet. Because I haven't decided on a management platform yet, I still schedule tweets in Hootsuite, but go directly to Twitter to personally manage, even if it means logging in and out of several accounts. There was a time when the Hootsuite platform was a better user experience than Twitter.
Next is Google+. It also included a similar "feel" as the Hootsuite platform, where it is buggy and seems like it was build in Flash. At least there, you can revert back to the original experience. They don't force you to use it.
So when you plan to update or create a website, users don't give a rat's behind about the Flashy look as much as the experience of using it. If it spools and your popup video ads have to load before one can look at the page, it sucks.