This should really be a different thread, but I'll bite here. I have never seen any convincing evidence that Aikido movement is based on any style of kenjutsu. If there ever was a connection, I think it was lost a long time ago. I think Aikido movement is based on what works well with the human body at the ranges that Aikido is practiced.
I'll bite as well because I think there is something really odd about the original comment about daito ryu and swords.
The word daito in sword parlance simply means, well, large sword. Dai or O (ya know, O-sensei) means "big or large or great". The kanji for To here means "sword". It is often used if you're referring to the large sword in a daisho (meaning long and short sword "set"). So the katana is a daito while the tanto or wakizashi of a set is the sho (or shoto).
My understanding is that daito in Daito Ryu refers to a different kanji entirely for To. Something along the lines of "Great East". Same dai, different to.