You'd think - except it was the iPad users that were the first ones asking why we didn't have a mobile version:-) I suppose you can't win them all, right?
I didn't drill down deep into the UX on the site, but the m. version isn't that bad on a tablet - it's just quite obviously more fitting to a screen 300-400 pixels wide.
If you had iPad users previously saying they wanted a "mobile" version, see if you can figure out what specifically it was about the desktop version of the site that was bugging them. Do the same for the people asking about a "tablet version", and then find a happy medium of the two to start working towards.
Of course you can already predict that a desktop AND mobile AND tablet version is approaching silly, which is why the feedback you got before was a resounding "responsive design". At the moment, that's the closest you can get to "winning them all".
If an iPad user asks for a mobile version of a site, I would assume it would be so that they can view it on a smartphone not on an iPad.
Personally I wish people would get over this fetish for making the tablet version different to the desktop version. If it doesn't work on the tablet you'd be better off fixing your desktop version.