Last week, coffee giant Starbucks (NASDAQ: SBUX) gave investors a few reasons to be disappointed, including a lowered outlook for its global third-quarter comparable store sales growth and softer-than-expected Frappuccino sales. As a result, shares fell sharply, ending the week down more than 10%.While the double-digit pullback is undoubtedly disappointing for Starbucks stock holders, one group of investors may find a silver lining in the coffee giant's update on its business last week: dividend investors.