Just because he lives in the same country these are made, really doesn't mean much. It's like living in Detroit doebt mean you know insider info about cars. Information by osmosis doesn't really work.
As for him seeing the proto and that meaning he can tell the height better...given that people who own the hulk figure, have it in hand, say they measured it, and still get the height wrong by over 2 inches...seeing it in a glass case, and it being a proto meaning you can't count on it being the same, means that seeing it in person means nada. There are others at the event that said it was 20 inches. One guy said 36. A couple 24-26. All seeing it in hand.
And budget stark has stated he had no inside info, it was speculation.