I'll answer this, both in general and based on personal experience (long ago). No, people generally don't pay attention to a game's publisher. BUT, if they get burnt enough times (or burnt particularly badly), then they might.
Personal anecdote: long, long ago, I bought an NES and a couple of games. At the time, I had no idea there were separate publishers. Like many people, then and now, I thought Atari 2600 games were all from Atari, and all NES games for my new purchase were from Nintendo.
The two games I purchased--for nearly the same price--were The Legend of Zelda and Commando. One of them provided me with weeks of awesome entertainment. The other one was good for a day or so of frustrating, uninspired gameplay with awful performance to boot. And of course, the 3rd game I had was the pack-in, Super Mario Bros, which was also great (but I'd long since mastered the arcade version).
Perplexed at this huge disparity, I looked closely at the game manuals and discovered that the good one was from the console maker, Nintendo, and the other was from another company! I vowed never to buy another game from this awful "Capcom" again (long since broken, of course; Capcom are one of the greats).
How many millions of times can you imagine a very similar scenario playing out in today's homes with the Wii?