pp_rp - I'm a brother oil sample noob. Sent my first sample off today as well. I collected mine in mid-stream, so no problems there.
Mine was with the post office. Even with taking the letter from Blackstone I had to wait for the guy to print off the official policy, compare to the statements in the letter, and then debate with fellow employees.
They finally decided it was okay to ship, so I'm looking forward to getting my results in a few weeks.