The last time I saw this tested, anchor text beyond the first link never counted when the href attribute was exactly the same. There was some evidence, however, that when the href attribute used a slightly different URL (just a fragment identifier, for instance) then the anchor text was counted.
This was about two years back, so you might want to text it first. However, I wouldn't do testing on an important "production" domain. Internal anchor text, particularly in the content area, is a "ticklish" area for Google and frequent changes have resulted in ranking losses for some people - losses that didn't go away event if they reverted to the original anchor text.