Please, as funny as you may think that is, all of us had a time when we didn't understand powerbands and many other things. This guys admits he is new to all of this and comes to us for help, let's give him the straight goods and no funnies at his expense, OK?
Yes, powerband, not a real thing you can hold, but as these guys have said, where the "meat" of the power takes place. In a 2 stroke it is normally a sudden burst of power, so when they say "no powerband" it means the no sudden burst of it.
The stock Blaster is a bit weak, especially if you are used to MX bikes or more highly tned 2 strokes. Don't worry, it is there. A bit of tuning and simple mods can wake it up...
Steve