diff --git a/docs/VOLUME.md b/docs/VOLUME.md
index 645777a..9d0fd9a 100644
--- a/docs/VOLUME.md
+++ b/docs/VOLUME.md
@@ -172,3 +172,5 @@ Riak + leveled           |  Riak + bitcask
 ![](../test/volume/cluster_five/output/summary_leveled_5n_60t_i2_16KB_nosync.png "LevelEd")  |  ![](../test/volume/cluster_five/output/summary_bitcask_5n_60t_i2_16KB_nosync.png "LevelDB")
 
 Over the whole test, the bitcask-backed cluster achieves <b>16.48%</b> more throughput than leveled, but in the last hour this advantage is just <b>0.34%</b>.
+
+The results for bitcask look a bit weird and lumpy though, so perhaps there's something else going on here that's contributing to the gap closing.