According to at least one media article Trump has not been tweeting as much after the controversy surrounding his allegation that Obama tapped his phones during the campaign. To test the assertion I counted the number of Tweets in the 9 days since the original tweet making the allegation on Mar 4. Then compared that to the nine day period prior to Mar 4.
The data does not support the assertion that Trump is using Twitter differently. He posted 36 tweets before Mar 4 and 34 after Mar 4. I only counted the tweets on Trump's personal account rather than the official POTUS account.