I've never had much faith in 2000s-era Twin Galaxies scorekeeping, ever since I saw their recorded scores for Pokemon Pinball in the first Guinness World Records Gamer's Edition and realised that they were lower than my own (not especially good) scores.
In this particular case, it turns out that if you count unofficial records, Japanese player Koryan (who incidentally is still active) recorded over 5000 lines in 2001 [1]; compare the TG verified record of 4988 set by Harry Hong one month after this article in 2007 and the current TG record of 5164 set by Tao Kitamoto in 2016 [2]. It's likely that Harry Hong could have beaten his previous record at any time if someone had contested it earlier.