It always amuses me when people express surprise or shock that execs--or people in general--don't blog.
Blogging=writing. If you don't like to write, or can't write well, why would you have a blog? Most execs probably didn't become execs because they love writing and write really well. They are business people. Not writers.
Not to mention that blogging takes a ton of time--and, in most cases, you probably won't make a cent off your blog. If you're a super-busy exec who already makes a ton of money, why would you want to take on a really time-consuming, zero-return hobby? And even if you stood to make some money off your blog, it would be peanuts in comparison to the amount of time it takes to maintain the blog over the long haul.
I'm just sayin'....