I am sure he was referring to Cast saddles as Dauntless mentioned. I have 8 Strats and the MIM, MIJ Strats all have stamped steel saddles. All of my Squiers have cast saddles.
An interesting side note: My 50th Anniversary Deluxe Strat has gold plated cast saddles. I was very interested to see that. So I don't think it is a bad thing to have cast saddles. The other MIA Strat that I had used the stamped saddles.
I have done a comparison from my latest Deluxe Squiers to the MIA 50 Ann. Strat, and all of the measurements including body, neck thickness, and width mic identically. So The Squier is very close to the 50th including the saddles.
The major thing that gives sustain to the Strat is the Block. Recently in 2006 The MIM Strat went to a solid block and that was a major upgrade. Most Squier modders change the hardware from stock to a solid block, and stamped saddles.
The Blues is alright!
Guitars: 1968 Gibson SG, 2005 Gibson SG Standard, 2006 Gibson LP Classic Gold top, 2004 Epiphone Elitist LP Custom, 1996 Gibson Les Paul Standard. 2001 Epiphone Sheraton II, 2007 Epiphone G400.
Fender Strats: 1996 Fender 68 Reissue CIJ, 2008 Squier CV 50s, 2009 Squier CV 50s Tele Butterescotch Blonde
Amps: Blues Junior Special edition Jensen in Brown Tolex with Wheat front, 65 Deluxe Reverb reissue,1970 Sonax reverb by Traynor, Avatar Custom 2/12 Cabinet with Eminence Legend V1216 speakers,
2008 DSL100 Marshall Amp , Fender Super Champ XD,Fender Vibro Champ XD
Effects and Pedals: Fulltone Fulldrive II, Fulltone OCD, Fulltone Mini Deja Vibe, Fulltone Fat Boost, Dunlop Crybaby Wah, Boss DS1, Boss DD20 Giga Delay, Boss TU2 tuner, Boss BD2, Ibanez TS9 Tube screamer, Zoom 505. Radial tonebone hot british.