I agree that the TB should be measured to see if it is actually a restriction. the article below is a good read and talks about exactly that. It shows how anyone can measure the restriction on an intake system at various points to see what (if anything) is a restriction in the system.
tl;dr - Quantify your mods worth
2013 HB MTX, Tux Black w/ Black Pack - Snorkel DLT, K&N Drop in, E-Focus RMM, Redline Tuning Hood Struts, Custom Al. Skid-plate, Custom SCT Tune by Tom @ Focus-Power