I joined Twitter just about when my grandbaby was born . . . and that was a few weeks before Oprah, early in 2009. Back then there were somewhere around 10 million Tweeple. Now there are more than 145 million.

Jack Dorsey’s visit to my San Francisco State marketing class convinced me that Twitter was NOT a fad. And now it’s my job to convince my many Baby Boomer friends and business colleagues that they need to get on Twitter sooner rather than later.

Here’s how Twitter has grown — and changed — since 2009

[from a post in ReadWriteweb]

1. People who created a Twitter profile before January 2009 now account for just 4.7% of the total Twitter population. [Love to think I started the UP trend :-)]

2. 82% of Twitter users now provide a name, compared with only 33% in 2009.

3. 73% provide location information, compared to 44% in 2009.

4. Having a profile on Twitter is becoming increasingly important.

5. The vast majority of Twitter users – 95.8% – follow less than 500 people.

6. What Sysomos calls “a small hard-core group” – 2.2% of Twitter users – have accounted for 58.3% of all tweets, while 22.5% of Twitter users have accounted for about 90% of all activity in 2010.  In 2009, Sysomos reported that 5% of users accounted for 75% of all activity, 10% account for 86% of activity, and the top 30% account for 97.4%.

Are you on Twitter yet? If so, how do you fit into those stats?

If not, WHY NOT!!