As per the recent report of RankRanger, Google has the extended the number of characters that they show for the title in a search results snippets from the average of 55 characters to 67.5 characters. This is particularly a 20% increase in the length of an average number of characters in the title of search results snippets. This is an absolute global change. It impacts all regions of Google not only the U.S. but this does not appear to impact the entire mobile results but it only impacts a desktop result.
Forum discussion at Twitter.