SAN FRANCISCO (Reuters) - When Apple Inc (AAPL.O) announces its first-quarter earnings on Thursday, investors will seek signs of whether the company’s $999 iPhone X launched last autumn was a Steve Jobs-style hit or, as more analysts suspect, a letdown. In recent weeks, Wall Street analysts have come to a consensus that iPhone X sales were slower than previously expected for the first quarter that ended in December and may drop off sharply for the March quarter.