Well, they do it to everything else but the rimfire revolvers, so I can just see the porting... and imagine cowboys with ported sixshooters...
Oddly, I considered several Taurus models a few years ago. Their website stated that the models I looked at were also available unported... but they never said where or when! Porting is a deal breaker to me. When I A-B-ed my .454 SRH with a range-mate's RB, I noted no difference in recoil - just a lot more muzzle blast.
Working at the range as a part-time RO, I have seen my share of dysfunctional firearms... and several of them were Taurus - particularly that Millenium series. The 'Trackers' seem a bit better made, IMNSHO. The only broken/jamming S&W and Rugers I remember were semi-auto's, too. I don't know where folks find that steel-cased garbage ammo - it's apparently abundant locally in both 9mm & .40 S&W. I recall one Ti blue 445, I think, in .44 Special. A couple of cylinders full, and it would lock-up. That gun has changed hands several times. I have heard the warranty horror stories as well. I have had to send a one-day from new Ruger Redhawk back home earlier this year for poor QC, too... but it returned as it should have been in a few weeks. A worn S&W was also sent back for work this year by me... the call was on their dime, and it was returned as-new gratis in a few weeks as well. Both companies sent pre-paid labels - great warranty. That is important... as is parts availability.
First step for me is for Taurus to offer a .44/.45 without porting...
Stainz