I think it depends on the group and/or station. I know some of the smaller stations don't pay very well. There are also a few personalities making $100k+. I would bet the starting salary level is around $30k. The top performers are making the bigger cash. (and probably deserve it.) Guys like Erling, Phil & Brent, etc... If the morning guy also doubles as the PD, they can expect even more than average.
Morning drive is very competitive and it takes a lot of work and dedication to make it work. Several have tried, but few have knocked it out of the park. Some of the current batch have potential to do well. KVOO, KWEN, KRAV, KFAQ, KRMG and of course KMOD. Those shows have the most potential at this point. The show on KTBT could eventually be a top player especially 18-34.