You should definitely analyze how 2.0 does, I expect it to hold better than 1.0.
Note that the peg in 1.0 was effected heavily by a software bug for a while, and then more recently by the fact that it is being phased out to make way for the 2.0 system. So right now bitusd has been worth more than $1 for a while because the shorts are trying to get out of their positions and eliminate the old bitusd (because they are forced to), but some of the bitusd has been distributed to people who either arent paying attention or cant sync the client or arent doing anything, and the supply and demand imbalance has been pushing it over $1.
Bitusd were definite a good store of value throughout, not only did they not break below $1, but they ended up being worth more than a dollar.