Well, clearly this person doesn't have much experience with web development... The webengine in iOS is the biggest pile of crap I've ever worked with since IE6.
"Oh? You want to click this? OK, let's wait for 300 ms just in case you want to double tap to scroll!"
"We finally fixed it, no more delay on clicks! Yo Apple, the delay is still there if it runs as standalone, good job..!"
"OK, you've added the page to the home screen, now, if you click another URL on the same domain you definitely want it opened in the browser, right? Good guess Apple, that's why I added it.."
"Wait, are you saying that if you switch to another app and back again to the standalone site you don't want us to reload the URL that's added to the home screen? You would prefer us to let you continue where you left off, what!?!?"
"Oh, so you think momentum scrolling is a good idea? Too bad, we don't support it on elements that overflow, but we do have it elsewhere, have fun! PS we do have an experimental flag to enable it, but then I sure hope you're not using animations with gpu acceleration, cause then we have som nice race condition bugs in store for you, so who knows if scroll will work or not.."
Seriously, iOS is the worst of them. Sure Firefox and Chrome often has experimental features with bugs, but both of them are much more "solid" when it comes to features you'll actually use in production.
Safari on iOS is the IE6 of today.