But after two flawless wins out of three races, he is surely now a petrifying prospect for the remainder of the season, and now sits pretty at the top of the driver standings.
Gordon Shedden, HiQ's most recent champagne moment winner, must be as equally pleased as Plato from his weekend's showing too, winning the last race at a circuit he thought would his Honda car would struggle.
Plato led both the day's first two races from start to finish - despite his Silverline Chevrolet Cruze being laden with 36kgs of success ballast in race one and then the maximum 45kgs in race two. He also set the fastest lap in both to ensure he took a pair of maximum scores. Matt Neal, meanwhile, retired from race one with a puncture and could only manage ninth in race two.
In race three, Neal's team-mate Shedden was gifted a clear run to victory when early leader James Nash's Triple Eight Vauxhall Vectra span off the track. Neal took third to give the Honda Racing Team a 1-3 result with Plato backing up his two earlier wins with fifth. Shedden's result, following fourth and eighth places in races one and two, keep him third in the overall standings and he has in fact closed to within just four points of Neal.
Notably, Plato has reached 57 career wins in the BTCC and he is now just three shy of Andy Rouse's all-time record of 60.
Oxford's Plato, looking to add a second BTCC title to his crown of 2001, said: "I expected us to be strong here and so it's proved. The team has used the summer break really well and dug deep into all the data. We've improved a couple of key areas and the result is a really fantastic race car now in the Cruze. This is where last year we really got our championship going and I have a sneaky feeling we're going to be very strong again from here on in. I'm feeling very confident for Silverstone."
Worcestershire's Neal, the former double champion, reflected on his day, adding: "I knew we were in for a tough weekend and it's been a case of damage limitation, whereas Jason has really gone and pulled a rabbit from the hat. That's an ominous sign for the rest of us."
Others to figure strongly today included BMW drivers, Airwaves' Mat Jackson and WSR's Robert Collard, who each took a second place, in races one and three respectively. Team Aon's Tom Chilton also enjoyed three strong results with third, second and then fourth place finishes to move up to seventh in the table and to within sight of fourth-placed team-mate Tom Onslow-Cole.
The latter came from 21st to sixth in race one following dramas in qualifying and was then third in race two. But in race three it all went wrong when he span off the track in a collision with Jackson. As a result he has lost his lead in the Independent Drivers' championship to Jackson's team-mate Steven Kane.
The weekend should have also brought some strong results for Plato's 19-year-old team-mate Alex MacDowall who on Saturday had become the youngest driver in BTCC history to qualify on pole position. Cruelly, though, his car's gearlever broke off the race one start line and he would fail to score in any of the three races.
Elsewhere, the Honda Racing Team leaves Snetterton still ahead of Airwaves BMW at the top of the HiQ Teams Championship. Honda/Dynamics also continues to lead the Manufacturers/Constructors standings but only after Aon/Ford had nosed ahead briefly in today's second race. It is also tremendously tight in the fight for Independent Team honours, with Airwaves BMW just five points clear of Team Aon.
BTCC Drivers' Points after Snetterton (round 6 of 10):
1. Jason Plato, 151
2. Matt Neal, 131
3. Gordon Shedden, 127
4. Tom Onslow-Cole, 113
5. Steven Kane, 109
6. Mat Jackson, 101
7. Tom Chilton, 90
8. Robert Collard, 84
9. Paul O'Neill, 82
10. Andrew Jordan, 58
1. Honda/Dynamics, 321
2. Arena/Ford, 313
3. Chevrolet/RML, 273
HiQ Teams' Points:
1. Honda Racing Team, 241
2. Airwaves BMW, 208
3. Team Aon, 193
4. Silverline Chevrolet, 175
5. Uniq Racing with 888, 89
6. WSR, 86