"Surprising Briskness In Economic Growth" is the headline the Times printed over a news article reporting that the economy "is showing some unexpected vigor."
This is "surprising" and "unexpected" only to those liberal groupthinkers who thought President Trump's attempts to cut taxes and regulations wouldn't translate into improved economic growth. Investors certainly expected growth, which is part of why they've bid up the prices of stocks since the election. Certainly a lot of the Americans who voted for Trump expected that he would boost the economy, and aren't particularly surprised that he's starting to come through on it.