Maybe.
Grimes had a phenomenal shooting season last year, esp from 2pt% range: .641. With that said, he only took 2.7 2pt shots per game compared to 5.7 3pt shots. AND when he shot inside the arc, it was usually for a high percentage attempt. Kind of like Mitchell Robinson-type of shot chart.
Bridges surprised a lot of people after the trade to the Nets. I don't think anyone imagined him going off for 26.1ppg over his 27 regular season games + 23.5ppg in 4 playoff games as a Net. He looked like a legit 1st option. It's still a pretty small sample size.
Doing amazing things for a small sample size isn't uncommon. In a slightly smaller sample size, Quickley averaged 21.6ppg in his last 19 games of the season. Does that mean he's ready to be a 20ppg+ scorer in the league and be a top-2 option on a good team? Not sure. Unlike Bridges, though, Quickley did not perform nearly to that hot finish standard once the playoffs rolled around. Obi Toppin has put up numbers when Randle's been out. And of course there was Linsanity.
The hard thing to predict is whether players can product big numbers in the 1st half of the season when they're a top scoring option... and whether that translates to opportunities for teammates, and, more importantly, winning basketball. Forgetting about winning for a moment, a luxury Grimes has is that his workload and responsibility has grown gradually over time, much like Bridges. On the other hand, come contract time his value will be hard to read.