If not, then let me explain. The way a web app works is that it uses HTLM5 to run entirely from inside your web browser. It's kinda a trick that builds an app into what you might think of as a web page.
Unfortunately, Apple have been caught throttling web apps. In particular, if an app installs its icon on the home screen, it won't be able to use all the features of the Safari browser. iOS is setup so that app will run at less than half the speed of the same app if you opened it in the browser.
I know it sounds strange, but developers really have noticed the difference. One has even gone so far as to post test results on his website which show the difference. To be fair, Apple aren't degrading the speed of home screen web apps; They're boosting the speed of web apps in the browser and they're not providing that same boost to the home screen web apps.
Is it a bug? Maybe, but I don't think so. It fits too well with things Apple have done in the past. For example, it's a well known fact that Apple have code for iOS that they won't share with most developers (fact, not urban legend). This code gives Apple's own apps an advantage over the competition.
So what this means for reading apps is that even if Amazon get the Kindle Web App working well, it's still going to be at a disadvantage. And the same goes for all the others.
Let's wait and see how long it takes to get fixed. TBH, I don't think it ever will be fixed because I believe this was deliberate. It just feels too much like something Apple would do to harm the competiton. What do you think?
via The Register