Since the big dump yesterday all the alts have been getting pumped silly. Most are up by +25% or more.
Another exaggerator.
Maybe exaggeration is contagious?

Out of the top 20 alts, only one is up more than 25%, and out of the top 100 alts, fewer than 15 are up more than 25%.
Are any of the rest of the alts meaningful, or should we look through the whole list of 681 alt/shit coins on coinmarket cap? Do you have another source?
Even though there may be something going on regarding the pumping of various alts, what is going on hardly seems to qualify as "most are up... blah, blah, blah"

Sort results by volume.
Also, you are looking at the gains for only the past 24hrs.