The setup is not entirely clear.
- The Ultrabay, is that where the DVD was located?
- Isn't it possible to swap the HDD and the SSD, so to put the normal harddisk in the Ultrabay?
I have a Macbook, five years old, with DVD writer which can be replaced by a second harddisk or an SSD. You need a special tray to put in the place of the DVD writer, which has the right connections between disk and laptop. I've read a similar question about the Mac, where to place the SSD - in the harddisk location or in the DVD writer location. What I remember is that there was no difference in performance.
I can't tell if this works for your situation, but I won't be surprised.
Still - what is your question? He has the SSD working, and I hope that he notices a significant speed improvement. I've seen (five year old) slow computers speed up incredibly with a new SSD. I can't tell how old your computer is, but it seems like two or three years? That is not old! Listening to Kris you have a completely outdated computer and installing an SSD would be a waste of money. I don't believe that.
If your friend wants to know if the Ultrabay is slower, then let him swap both disks!
If he has installed the SSD and hasn't noticed a speed difference, well, then Kris has probably given the answer you should accept.