Ok, have tested this s23dfx.exe, it IS statically linked. As all others similar .exes - no glide2x string and have "Glide(tm) Version 2.xxx" string inside.
Statically linked DOS glide games:
Battle Arena Toshinden - tsd.exe, 1177 kiB, Glide Version 2.03h2.
Descent 2 - d2voodoo.exe, 1667, Glide(tm) Version 2.2.
EF 2000 2.0 - _ef2000.exe, 2509, Glide(tm) Version 2.1; diagnost.exe, 946, Glide(tm) version 2.1.
Screamer 2 - s23dfx.exe, 1272, Glide(tm) Version 2.1.1.
Starfighter 3000 - star3000.exe, 1225, Glide Version 2.03h3.
Tomb Raider (Rush patch) - tomb.exe, 1114, Glide(tm) Version 2.1.1.
UEFA Champions League - uefa3dfx.exe, 2547, Glide Version 2.03h3; install.exe, 1878, Glide Version 2.03h3.
VR Soccer '96: Semifinals (OEM) - soccer.exe, 1646, Glide Version 2.03h2.
Whiplash - whip3dfx.exe, 1352, Glide Version 2.03h2.
XCar: Experimental Racing (unpatched) - xcarfx.exe, 1095, Glide(tm) Version 2.1.1.
Actua Soccer: Semifinals (OEM) and Fatal Racing (OEM) - don't have these games, can't test.
It looks like the only way is the code analysis. To find the exact way these games detect and initialize a 3dfx card. And to find why a Voodoo2 isn't always detected...
P.S. "Voodoo Graphics (Rush?) only" games:
Carmageddon/Carmageddon: Splat pack (carmav.exe, carmavg.exe).
Dreams to Reality.
Prost Grand Prix.
Screamer 2 (s2_3dfx.exe).
Screamer Rally (strt3fx.exe).
Tie Break Tennis.
Archimedean Dynasty and Battlecruiser 3000 A.D. - not sure.
Asus P4P800 SE/Pentium4 3.2E/2 Gb DDR400B,
Radeon HD3850 Agp (Sapphire), Catalyst 14.4 (XpProSp3).
Voodoo2 12 MB SLI, Win2k drivers 1.02.00 (XpProSp3).