• Twitter user demographics: 78% of Twitter users are outside of the U.S.
• Worldwide mobile ownership: There will be 6.8 billion mobile subscriptions by the end of 2013 (yes, this is nearly as many people as there are on earth).
• Worldwide internet connections: 2.7 billion by the end of 2013.
• Marketer tactical confidence: Though identified as the second-most important marketing tactic, only 53% of marketers feel confident executing personalization and targeting within their marketing strategy.
• Teens and social media: 9 out of 10 teens have used social media, with 17% identifying Instagram as the most important (a 5% jump since 2012), versus 33% for Facebook (a 9% decrease since 2012).
• Not online: 15% of American adults ages 18 and older do not use the internet or email.
• SMS: 98% of text messages are read, with the average response time 90 seconds (compared to 2.5 days for an email).
• SMS Marketing: 75% of people prefer receiving ads via SMS and 70% of Americans would like to receive mobile coupons from their favorite businesses, with SMS coupons more likely to be redeemed and shared than mail or newspaper coupons.
• SMS opt-out rate: Average opt-out rate for SMS across all campaigns is less than 5%.
• Millennial men: by 2017, 95.4% will be internet users, 86.4% social network users and 92.1% smartphone users (versus 91.9%, 78.8% and 70%, respectively, today).
• Cell phone activities: for the 91% of American adults that use cell phones, 81% send or receive text messages, 60% access the internet, 52% send or receive email, 50% download apps, 49% get location-based information, 48% listen to music, 21% participate in video chat and 8% “check in.”
• Email Marketing: 34.9% of marketing emails sent to iPhones receive 0-3 seconds of attention, versus 22.4% for Android phones, 41.2% for iPads and 29.5% for Android tablets.
• Smartphone user share: By 2014, 87% of smartphones will be iOS or Android, up from 70% in 2011.
• U.S. mobile commerce: Topped $10 billion in the first half of 2013 and could pass $25 billion by year end.
• Smartphone penetration: The U.S. ranks 13th in smartphone penetration at 56.4%, with the UAE leading the way at 73.8%.

If you’d like to share your reaction to the above or any other mobile marketing stats, please do so in the comments. We’d love to hear from you.

Sources: Mashable, Techcrunch, eMarketer, Fuqua School of Business, VentureBeat, Pew, SmartInsights, Pew, Movable Ink, eMarketer, Mashable