Trailing quarterly performance didn't impress the market, and full-year guidance didn't blow anyone away either.Next-generation customer experience specialist Verint Systems (VRNT -11.15%) wasn't feeling like the future on Thursday. The company published an earnings report that displeased investors, who pushed its share price down by more than 11% during the trading session. That was a notably steeper decline than the relatively light 0.3% dip of the S&P 500 index on the day.Only flat top-line growth but me ...