Sig's track record was just as sound as Glock's before the P320. The P226 was the Navy SEAL's sidearm of choice for a bit and it nearly became the standard sidearm for the US armed forces in the 1980s, narrowly losing out to the Beretta 92. The P210 is widely considered to be the most accurate service pistol ever created.
Sig Sauer Inc in Exeter, NH is a completely different company than SIG Sauer AG in Switzerland.
The Swiss Sig's have a sterling reputation. The P226 that entered the XM9 trials (against the Beretta 92) was imported from Switzerland by SAKO.
The US company didn't really start manufacturing until the 90s with the P229 and the Sig Pro series (where they were only tasked with making the plastic frames, not the more intricate lock work).
If we're talking about Swiss SIGs, that'd be the P210 handgun and to a lesser extent, the SG 510 assault rifle. The P226s were always German SIGs (at least until SIG US got started), the "Montage Suisse" models being assembled in Switzerland from German parts rather than being the product of the Neuhausen factory.
That company structure is no longer quite the case. L&O Holdings (Germany-based holding company controlled by 2 German individuals) owns Sig Sauer USA, Sig Germany, and Sig Sauer AG.
