I've also used several mobile websites that are WAY better than the app (Redbox, for instance). Depending on the use case, the browser can sometimes be the best experience, though obviously not always.
Each set of needs is a beautiful and unique snowflake. Anyone reflexively choosing Technology X solely because Company Y does(n't) is probably not qualified to decide on tech stacks.
But when you see LinkedIn push back when they had one of the best known html5 app in the appstore, that warrants questions, specially since they are farther in the process than most teams
(they created an html5 app, iterated on it for couple of months, decided to revert back because of memory performances )
The lack of teams being open about their process or them being more in the shadow certainly does not helps, we need more success story with html5 being in the appstores. It still certainly considered a risk by management teams when you associate all your mobile efforts with html5.