Glad you have enjoyed my review Alex. That quote is only accurate when we're talking stainless steel bands.
Yes, the new DateJusts (starting from last year) have solid gold middle links (on the Jubilee versions) which, of course, increase the weight.
Gold is much heavier material... and obviously solid gold / two-tone bracelets can't be compared to their stainless/gold plated counterparts. However, genuine 18K TT Oyster bands still use hollow links. They're surprisingly light (just like the old TT Jubilees), but of course they have slightly better feel than the plated rep incarnations.
I suspect Daytona is the only TT model that uses solid gold middle links on the Oyster band but I'm not 100% sure. I know TT YachtMaster middle links are still hollow.
Here's the good old TimeZone Rolex weight chart (for SS versions). I wish there were similar chart for the gold models: