The spring Arbitron ratings are in, and the folks at "Kiss" WXKS-FM (107.9) are celebrating. The Clear Channel-owned Top 40 station tied for first place with news-talk giant WBZ-AM (1030), rising from a winter 6.1 share to a 6.3 share of all adult (12 and older) listeners. A share is basically equivalent to one percent of the total audience listening ... ...