I do believe that anyone can draw with enough time. In 2009 I took 8 days holiday, one per week and dedicated it to drawing. I could see the improvement vastly:
I didn't dedicate enough time to each sketch so only got a handful of good drawings. I've fallen out of it again so would have to get right back to basics, but it shouldn't take too long before you start to feel fluid again.
http://eightweeksproject.wordpress.com/2008/03/25/projectone...
Then in 2010 my new years resolution was to do a sketch a day. Hard going but very enjoyable:
http://www.youtube.com/watch?v=NFWNlK2H29U
http://www.youtube.com/watch?v=lYtXlhVLYYE
http://martinadams.files.wordpress.com/2010/04/l_640_480_937...
http://martinadams.files.wordpress.com/2010/04/p_640_412_cb0...
I didn't dedicate enough time to each sketch so only got a handful of good drawings. I've fallen out of it again so would have to get right back to basics, but it shouldn't take too long before you start to feel fluid again.
Being able to draw is like a muscle.