Yes, but Morrowind released a long time ago too. It's probably going stronger than Baldurs Gate.
This isn't just a Fallout 3-Mass Effect comparison when you say all the works of gamesas are not up to par with all the works of Bioware. Some lines in Fallout 3 weren't very good, but I remember the cheese oozing out of Mass Effect 1 too, in some of the lines. The story of Fallout, Oblivion, and Morrowind are great, save for the ending of Fallout 3. New Vegas' story is pretty well told too. Don't forget WET either.
Also, what attracts the most people in Fallout and Oblivion is the fact that it's an entire world in which you can do anything you like, and roleplay an actual life. Can you eat in Mass Effect? No. Can you sleep in Mass Effect? No. Can you choose your occupation? No. Can you get a house? No.
All these things are missing, and that's what an RPG is all about. Im not saying Mass Effect and Dragon Age aren't awesome games, they are, definitely, and I absolutely love them. They just can't touch TES or Fallout from an RP stand-point. In the end, to most people; that's what matters.
First off, Morriwnd was relased in 2003. BG1 in 1998, so there.
Second, WET which was a crappy arcadey game was not developed by Bethesda Game Studios and doesn't seem to have any deep story like Morrowind or BG. It's just a mashup of Kill Bill and Tarantino violence with backflips and tequilla.
Third, RP-ing is a subjective matter. Like some person before me said, "I'd rather know what the hell is going on in the box instead of having more sand", I just guess I am that kind of person. Sure, all these aspects like owning a house going whenever you want is nice, but it totally falls apart for me when it's presented in such a simplistic, cheap and dumb way ala F3. Bioware does not have this, but not being able to own a house is not making Mass Effect 1 less of an RPG. Ever heard of the Gothic series for example? It also doesn't have this RP-stuff and is widely praised as an RPG.
Main thing in Bioware games is(or was, now in EA's grip) engaging story, deep, fleshed out characters and dialogue. There is a reason why there's a 'Talimancer' group on their forums. Can you for example see people praising the same way companions such as Jericho(jerichomancers?) or Butch(butcho.... erm, that doesn't sound right)?
But different strokes for different folks I guess. :shrug: