Not in 91-92. Pinnacle B Team, believe it or not, was the very first, limited best-of player insert set. Nowadays, almost every product has a best players or best rookies insert set.
90-91 had a 1 per pack insert set of the Central Red Army in OPC. But these inserts were printed more commonly than even base cards in the set. Upper Deck had the silver stereogram stickers featuring Hull, Gretzky, Messier and Yzerman in action. Neither are considered important now although the CRA set was hot back in 1991.
91-92 had UD with their first ever Hockey Heroes insert set featuring Brett Hull, 10 cards including the rarer header card, inserted at about 2 per box. Score had the Bobby Orr insert set, six cards inserted at 1 per 3 boxes. Both had longshot autos. UD also had the SP cards like Glasnost on Ice commemorative. And UD had the nine card hologram Award Winners, inserted at a couple per box, roughly, the successor of the 9 stereogram sticker set from the previous year. Pinnacle had the B Team best of set, about a dozen cards, one per three? boxes.
So at that time, there were few insert sets.
While it may be the first "best of" set, most sets that year had inserts and/or subsets.
Upper Deck had 10 Brett Hull “Hockey Heroes” cards randomly inserted in low-number series packs. 2,500 cards signed by Hull were randomly inserted in packs. Nine “Award Winner” Holograms were issued, with some found in low-series packs and some in high-series packs. 18 “Euro-Stars” were found one per jumbo pack.
Score had a six-card Bobby Orr insert set randomly found in the 15-card packs. Orr cards 1 and 2 were found in Canadian and American packs; cards 3 and 4 were found only in Canadian packs; and cards 5 and 6 were found only in American packs. There was also a chance at pulling one of 2,500 cards autographed by Orr.
Pro Set Platinum had 20 “Platinum Collectibles” insert cards. The first 10 were found in Series One packs, and the latter 10 were found in Series Two packs.
Pro Set had Four different “CC” insert cards found in Series One packs, while five more were found in Series Two packs. 500 cards signed by Kirk McLean were randomly found in English packs. 1,000 copies of Patrick Roy’s Series One card (#125) were autographed and found in French Series One packs. Another 1,000 copies of Patrick Roy’s Series Two card (#599) were found in French Series Two packs. 10,000 NHL 75th Anniversary holograms were randomly found in Series Two packs.
Parkhurst had 9 different “Parkhurst Collectibles” (PHC) inserts, with cards 1-5 found in Series One packs and cards 6-9 found in Series Two packs. Less than 15,000 Final Update Sets were produced. With the exception of autographed inserts, that makes these last 25 Parkhurst cards the rarest cards from the 1991-92 season.
O Pee Chee had 66 insert cards – usually referred to as the “Sharks and Russians” set – feature nine players who were selected by the San Jose Sharks in the 1991 NHL Expansion Draft, 55 players from Soviet teams that toured the NHL in 1990-91 and two checklists.
Pinnacle had 12 “Team Pinnacle” insets, also referred to as “Pinnacle B” since the cards are numbered B-1 to B-12 on the back. Pinnacle also has some subsets like “Sidelines” and “Good Guys”.
Bowman had 21 “Team Scoring Leaders” glossy cards, found one per pack.