How credible can be communication touch-points?

While working on a training assignment, I decided to include this matrix. Not sure how many of you agree.

Touch-point	Strength/Weakness	Communication credibility
Sales Team Contact	Quality of contact and follow-up	Takes time to establish trust
Website Access	Information updation cycle Impersonal May have limited, template information	The algorithm to make it credible is fairly known.
Print/ TV/Radio	Limited distribution	Strong credibility via editorial coverage
Another customer reference	Limited usability	Strong- nothing like word of mouth
Third Party Advisories	Limited reach	Strong
Industry Conferences	Focused, targetable audience	Moderate
Blogs	Can become unfocussed easily	The diffused focus makes it real Easy to listen back