She won't debut big, but she'll definitely be a slow burner on the charts.
"Just Dance" is slowly but surely picking up here, and when the album is released downloads will increase for it. Plus radio is improving. It'll hit Top 40, and that's not even including the possibility of a big TV appearance... (Dancing With The Stars? Do it Gaga!)
Then "Poker Face" will hit, and sales will remain consistent. I see "Poker Face" picking up a lot faster obviously.
Lady Gaga just reached her peak on the Australian Charts, she debuted at #12 and is now at #7. She's definitely a slow burner, people just need to know about her music first.