Teething can have a very small effect on your child, or it could really bother her.
Both my daughters got low grade fevers, drooled a ton, chewed their fingers until their fingers had a bunch of little tooth cuts on them, had stuffed up noses, and were generally miserable and cranky for the whole process.
When their gums are bumpy/swolen and red, BEFORE the tooth actually breaks through, is the most painful time. Both my girls got their first tooth at about 6 months. I alternated infant motrin and infant tylenol with great success. I tried to schedule the dosages to get the maximum number of nursings or naps possible for each dose. (if they took a nap at 10am and 2pm I'd give a dose at 9:30am, nurse at 9:55 after pain killer started working, then put her in bed. She'd get a more relaxed nap (ever try to sleep when you're in pain?) and be happy when she woke up, play for a bit, then go down for her second nap without fuss.
The front teeth will be "less" painful than the molars simply because they are a smaller tooth. Keep in mind, though, that these teeth are literally cutting their way through gum tissue from the jaw bone to the surface.
Have you ever gotten a cut on the mouth from a sharp chip, or a canker sore, or burnt your mouth on something hot? It hurts, and that usually only lasts a day. Even so, you aren't inclined to eat much during that time because rubbing on the sore spot hurts.
Babies' sore spots are right in the front of their mouths, and they rub when they eat/nurse for several days!