The leading cruise line operator reported blowout results that you should've seen coming.Shares of Carnival Corp. (CCL 7.50%) opened higher on Tuesday after the company posted better-than-expected financial results. The beat on both ends of the income statement shouldn't really come as a surprise. Revenue rising 18% to $5.78 billion -- ahead of the 16% increase that it initially targeted -- isn't a shock, even if it did fall short of analyst targets last time out.Momentum at rivals Royal Caribbean (RCL 3.47 ...