The company's recent results were mixed, and Wall Street's reaction was underwhelming.It's fair to say Wall Street reacted lukewarmly to UPS' (UPS 0.14%) first-quarter earnings report. On the positive side, five of them nudged their price targets higher (with BMO Capital taking it to $169). Still, only one has a positive rating on the stock (Oppenheimer's "outperform" rating). The rest remained at "hold/neutral/market perform."UPS's mixed first quarterThe lack of enthusiasm is understandable. Although UPS b ...