The Twins always seem to play on edge nowadays. All season long, even in April and May, we hear about "huge" homestands, "critical" three-game series, losses that are "really frustrating," other losses that are rationalized away... and so on. I don't know if this constant urgency is communicated to the players or not, but if it is, then it's no wonder they burn out in September every year. Obviously this could all be pop psychology, but maybe not. I miss the days of TK and his "not too high, not too low" philosophy for making it through a six month season. Gardenhire and Kelly seem to be extreme opposites at this point.
This is not to say the "win now" approach can't work; as you have said, the Twins led by Gardenhire have been able to win under pressure situations in the past (postseason notwithstanding) but it feels different now. This new urgency to win every night is one thing I think could disappear immediately with the hiring of a different manager with a different style. Let the guys relax and see what happens. Again, maybe just my perception.