Not bad, but I just charged my Spark EV at 45kw yesterday that has 3x+ smaller battery than Bolt. Chevy should have known that fast charging was going to be hot topic, and Tesla chargers dominate volt's big time. System engineers could have specified battery pack to have 100V higher pack voltage. That would have allowed Bolt to use 500V charger and it would have given ~15kw faster charge rate. Hopefully next battery architecture will have higher battery pack voltage.
Actually, the reason Tesla models charge faster is the amperage, not the volts. While they do have a slightly higher pack voltage, it's not actually that much more. In fact, the Model 3 base appears to have a lower pack voltage than the Bolt EV, and the Model 3 Long Range seems to have a slightly higher pack voltage. It's the fact that Tesla models seem to push close to 300 A or more below 15% SOC that gives them such high peak charging rates.
As for the Bolt EV, it's anyone's guess why GM software restricted the charge rates so much. My guess is that it was a combination of bean counters and accountants trying to mitigate battery replacements under warranty. They probably felt that ~ 1 hour to 80% was good enough (or at least the best balance). As EV drivers, we know that's not the case, but they probably couldn't see the value.