I see from your other post that this is still not resolved. Can't say it ever sounded like a balance problem anyway, I've lost balance weights before and it introduces vibration, but not a wobble.
It may be the tyre is still getting broken in, the characteristics do change a bit when they're new and riding style does affect how fast the tyre settles down, if you go very gently (or have only had roads strewn with wet leaves to ride on) then it might take more than the suggested 100 miles.
Did the shop actually take it for a ride? If they did, and didn't experience the problem then it probably isn't down to anything more alarming. A rider of different weight and riding style might well not trigger the wobble whereas if it was loose steering head bearings, worn swingarm bearings or a wheel alignment issue then they should have spotted that straight away.
If you're not convinced of their competence or have already covered a few hundred miles on the tyre then I'd follow Limax's suggestion and check the wheel and tyre are running true.
With the bike on the centrestand, stick blocks of wood or something stable under engine (or get a patient friend to sit on the pillion) to prop the front wheel off the ground. If you gently ease the pads off the brake discs with a screwdriver it'll be a lot easier to spin the wheel (just remember to pump the lever a few times to get them back where they need to be when you're done). With the wheel spinning, sight along both sides in turn to see if the rims waggle left and right and then check it side-on to see if they wave up and down. Obviously, if the rim shows any such movements, that is where the problem lies... the wheel is damaged.
Next, look side on, at where the tyre meets the rim. There should be a circumferential ridge on the rubber visible within a few millimetres of the rim (varies with the make and model of tyre) and this should be a pretty constant distance from the rim all the way round. If it's not, then the tyre isn't evenly seated, either because it's damaged/defective or because the shop didn't do a good job of putting it on. (The latter is unlikely, the only time I've experienced that was when I tried to replace a tyre myself with a few poxy tyre levers and several of my mum's spoons.)
Finally, view the wheel from the front again and see if the shape stays constant as it spins.
