Overall, most manufactures try to obtain a flat response....
I think that's a little generous from what I've seen. Many "high end" speakers are juiced one way or another. From rough treble to dips around 2.4kHz to enhance an artificial sense of imaging to boosts in the bass, or low impedance mid-bass to make speakers seem more "discerning." Product differentiation is very important to many manufacturers and that's hard to do when they all share the same frequency response.
There are of course exceptional products that try for exceptional neutrality, but I think saying "most" try for flat is a little generous. Over time speaker "voicing" of a particular manufacturer also may change as do the fads and what a magazine may promote as "best."
There's also the matter of listening habit and style. Flat in a test room isn't flat in your room, and you may not like it. If you listen at low volumes, boosts at the ends may be ideal.
Best,
Erik