Michael Wu, Principal Scientist at Lithium Technologies describes other factors in his blog: Credibility, Bandwidth, Relevance, Timing, Alignment and Confidence.

FORBES: Can You Measure Your Digital Eminence?

Obama also won largely positive reviews for her inaugural wardrobe: Reed Krakoff and Thom Browne by day, and Michael Kors and Jason Wu by night.

NPR: What Will Michelle Obama Do With 4 More Years?