Not a big issue
The ticking is not a big issue as it is not loud enough to bother me. The TSB for "ticking" has been around since 2003 or thereabouts with this Duratec 3.0L. I do not believe that the tick is doing any damage or the engine would register some type of malfunction code. You can hear similar ticks in other cars/trucks as well, but unknown whether the tick is injectors firing, camshaft tick, or timing chain noise. The cars/trucks with a metal chain typically produce more noise than those with a belt. The engines in my '69 Camaro SS and '72 Ralley Sport made plenty of racket...all as normal.
If you think the noise is due to the camshaft tick TSB, then when you listen to the engine the sound should come from the back of the engine near the firewall on the passenger side. If the noise is related to the timing chain, then the noise should be more toward the middle-front of the passenger side. My dealer, who was not familiar with the TSB, had a couple of techs listen to it and both said that it did not sound abnormal and keep an "ear" on it to see if it gets worse. If it is a "problem," then it should manifest itself pretty quickly.