As a heavy mobile web user and someone who cares about webmasters doing things right, please take a critical look at your site and make sure you fix any mistakes like these. Please. Your users will love you for it.
I would add something more : if you have an app to make your information available, make sure it handles the URLs of your website properly. Special minus points if your mobile website tells me to download the app although I already have it. I'm looking at you, LinkedIn.
My biggest complaint is that they keep serving up a mobile site. Given a 720p smartphone and a 1200p tablet, I don't usually need a mobile site in the first place. But some sites ignore it when I "request desktop site", or keep jumping back to the mobile site. Worse still if they in-yer-face you about their app, and paralyze forward motion even when you say "no" or already have the app.
Restaurant websites that insist on posting their menu as a PDF. Yes, I'm sure it is beautifully typeset but many of your potential diners don't want to jump through hoops just to get the gist of your offerings.
+Michael Maggard You are correct about that but even worse than that I have been to several sites where the menu was posted on a page but the page was so large i could not even view the whole picture without dragging and holding to keep the picture from popping back to original position. In those cases I would have loved a PDF. lol. And i have an samsung GS3 so it's no joke.
+Pierre Far I get about 35 words per line on the G+ website on my 10" tablet, because it serves the phone version to Android tablets (and to ipads). The user agent string for ipads contains the word "ipad" so sites could easily send something more suitable to those devices (although the ipad mini might be a problem) but Android tablets only have "Android" in the UA string. Is there a way to identify an Android tablet and send it the desktop version?