The one that winds me up that I've seen a lot recently and it shouldn't but it does, is the mixing up of the part participle vs past simple - and I'm not getting at people for not knowing this technical explanation, because I also didn't until I trained as an English teacher, but it's the difference for example between:
I saw one somewhere
I've seen one somewhere
The mistake that people make is to write: I seen one somewhere.
Or
I ate those eggs
I've eaten those eggs
The mistake: I've ate those eggs.
It only happens with irregular verbs (see / saw / seen; be / was / been; eat / ate / eaten; go / went / gone) but to me it feels so instinctive to use the right version that it is jarring every time I see/hear it used wrongly. Even before I knew the explanation of why we use one form over the other.
I don't think people are any more verbal today than they are in the past, I think there have always been groups of people who are more verbal than written, I just think that the difference is that social media, text messaging and instant messaging have caused people who would have previously rarely written anything to write more and write more publically, meaning that you notice spelling and grammar more. So in some ways it's the opposite of being more verbal.
If you hear somebody saying "I brought some apples and bananas from the shop" or "I seen him yesterday" then you'd probably put it down to dialect and think nothing of it. When it's written down, it is more surprising, because 10-20 years ago, almost everything written down would have been proofread and checked, because it would have been a professional document, a book, an article, or something else official. Text messages had their own grammar and spelling rules when you were charged per 140 characters, and even forums like mumsnet/netmums tended to delineate into ones where correct grammar/spelling was deemed important and ones where it was not. You just would not write to communicate with other people in a colloquial or casual way, unless it was a short note or something.