Investors are always looking for stocks that are poised to beat at earnings season and Plains All American Pipeline, L.P. (PAA) may be one such company. The firm has earnings coming up pretty soon, and events are shaping up quite nicely for their report.That is because Plains All American is seeing favorable earnings estimate revision activity as of late, which is generally a precursor to an earnings beat. After all, analysts raising estimates right before earnings — with the most up-to-date information pos ...