I am impressed with the power of atDNA testing to confirm recorded information, forge links between generations and extend ancestral lines further into the past.
DNA tests are long-term investments which will become more important over time as databases of DNA results grow and provide more matches. A DNA test is a very powerful tool which has the potential to break through roadblocks by revealing connections that were not available through documentation.
After loading your atDNA results on gedmatch.com (gedmatch directions), you can compare atDNA results with those from my family using the subpages below. Note that, for example, on average 31% of fourth cousins share no DNA, so if we share no DNA that does not mean we are not cousins.
As my distant cousin Christopher Blake Sims said, what we are doing today with DNA research will pay it forward for future generations in researching their family.