The result of this shift seems pretty obvious. In July, ISIS was booted from Mosul, and this week Raqqa was liberated. For all intents and purposes, ISIS has been defeated. Trump did in nine months what Obama couldn't in the previous three years.
Trump's critics will insist that victory was inevitable, given that Obama had severely degraded ISIS over the previous years, and that all Trump did was continue Obama's strategy.
But the bottom line is that while Obama preached patience, Trump promised a swift end to ISIS, and then delivered on it.
@Gandalf ..........crickets