USamp's survey found that out of the 158 people who managed to log on to their Obamacare site without technical problems, just 42 people enrolled in a new plan. Another 109 said they were "still weighing my options," and seven people decided not to enroll.
But Wheeler noted that most people who weren't able to get on the marketplaces said they would try again. "It didn't totally turn them off to it," he said.
(Read more: Young adults face pay little now, pay more later scenario in Obamacare)
A total of 60 percent of respondents said they'd try again "later this week," and another 23 percent said "within the next few weeks." Fifteen percent said they would "wait and hear that the website is working properly to try again."
Just 2 percent said they would not try logging in again.
"It's a start. Like anything new and completely different, there are some kinks which must be worked out," said a 56-year-old Obamacare backer from South Carolina who had trouble logging on. "Be patient, and all will be OK."
Another Obamacare supporter, a 32-year-old Arizona woman, said: "It is annoying because the website is jammed. However, I am sure it will be worth the wait."
Wheeler said that when he read the first media accounts of the technical problems being experienced by the Obamacare marketplace visitors, he was skeptical that the situation was as dire as being portrayed.
"Stories can be sensationalized in the press," he noted. So he was surprised when uSamp's survey backed up those negative headlines. "We operate a lot of websites," Wheeler said. "If our websites were failing like that, we'd be out of business."
As a 29-year-old Minnesota woman who opposed Obamacare told uSamp, "The experience is very frustrating."
"For something that is 'required,' they make it very difficult to comply with the rule," she said.
—By CNBC's Dan Mangan. Follow him on Twitter @_DanMangan.