Yeah you know I've tried everything including pulling out wort with sanitized measuring cup and pouring over a paint strainer like fabric that will catch all pellet hops and most trub. We call them "grannies panties" b/c of the resulting sludge and having to constantly clean off the "panties" which is super obnoxious and borderline sanitary (hope that's appropriate for this blog). Lately we've given up on grannies, done a little whirlpool, let settle and just drain it out, sometimes with a lot of trub. My point is that I haven't tasted any difference especially in future use of the yeast cake. I think a fancy hop filter like http://www.brewershardware.com/FILTER1.html
is maybe the only way to insure trub removal.