Does bewiring decrease "wholeness" ?

Thanks for your comments.
Your suggestion IMO, that the salesman as an interest in his suggestion is not correct, since he was complimenting the single wired option (with jumpers) over the biwered option.
I am also aware that, bi-amping was once evaluated by a revewer with the specific set-up he was working on, as increasing some aspect of the sound being reproduced but with a slight decrease in the "realness" or "directness" or "wholsomeness" of the musical event.
The salesman was basically suggesting that for him to be-wired was conductive to give the type of result that I have tried (excuse my french) to describe above.
I had never read or heard about it before, but this audiophile-salesman was definitelly using a single run and jumpers on his speaker set-up at home.

OK. I cut my cable in two, (ART monolith), got rid of the jumpers and be-wired the cable to my Proac 1SC and yes, just like the Stereophile review on same, I perceived some added overall clarity and a little shift in perspective and tonality.
Yet, the overall impression a get, when attending a concert in Montreal was reduced, but more importantly, the expressivness, brillance and sublety of atmospheric moods on witch the Mendelsohn violon concerto was builded an appreciated for, became suddenly inaccessible, to say the least. The be-wired version, gave me sound that where dis-jointed or dis-associated with the musical intent of this particuliar genre of music, that I know now, and the salesman must have knowned then....

Ok, I am back, with, this time a more appropriate result, concerning the bi-wired version of the Proac1SC versus its jumper version. I haden done it entirelly properly, so here is the corrected result.
An added clarity was again obtained, sound sources where more distinct with less convergence giving in the process, an added stability to the imaging-soundstage phenomena. Thighter bass and over all tidyness could let in more details as well as more spring or jump to the plucked string guitar or other dynamiquelly contrasted elements.All interesting studio recordinds benefited and male's voices where as real and musical as I know them to be. I doubt that any musical elements has been lost in the process, althought the bass heavyness of the single wired version as help make my mini- monitor sound a little more concert like and the overall added looseness might have contribute to the little extra lyricism and velour like rendition of some female voices and the violon.
All and all, for me and in my set-up, (analogue, tube phono stage, SE 300b power amp.), the be-wired 1SC seems to be a clear gain over the single wired one.