If there were an agreed upon standard by which to compare something to, the concept of “accurate” might have some meaning, but there isn’t. On top of that, there are so many ways by which something could deviate from that ideal, there would be no way to decide which takes priority and how deviations in one measure should be weighed against deviations in another aspect of performance. In short, accuracy is meaningless. If the Garrard delivers musical insight and pleasure, it is performing well.
I like the punchy and weighty sound of idler tables like the Garrard 301 and 401. A local dealer puts these tables into six figure systems based on sound and only resorts to modern tables where customers are reluctant to go with vintage tables. I own a good modern table-Basis Debut with vacuum clamp and motor controller. It does a better job than idler tables at suppressing ticks and pops and other noise, but, I would not argue with someone who finds the table to sound “dead” compared to an idler table. In their particular way, the 301 and 401 are fully competitive with good modern tables.