Not a big trend guy, but I think it's significant in playoffs, as we see the exact same scenario playout year after year after year and parallels can be drawn.
Road playoff teams coming off round 1 win are 7-2 ATS in round since 2002
Teams coming off round 1 bye are 10-18 ATS since 2003
Since 2005, teams with a first round bye are 10-10 SU. Some notable results for 1st round byes last 3 years:
2007 #1 Cowboys beat by Giants 21-17
2007 #2 Colts beat by Chargers 28-24
2008 #2 Panthers beat by Cardinals 33-13
2008 #1 Titans beat by Ravens 13-10
2008 #1 Giants beat by Eagles 23-11
2009 #2 Chargers beat by Jets 17-14
1) Home field just does not mean that much in NFL, and clearly not in the playoffs.
2) Teams get hot and will ride momentum on the road and keep winning over flat teams off bye. Examples: 05 Steelers (#6th seed SB champs), 07 Giants (5th seed SB champs and this year's Packers (6th seed legit SB contender).
3) Inexperienced teams that killed it in the regular season with favorable schedules, i.e. Falcons, do not really benefit from bye. First, they already peaked months ago and now just sat around for 2 weeks. Second, the pressure is on them huge to win at home after such a good regular season. Thirdly, they don't have the experience or leadership to know how to appropriately respond to the situation.
Falcons, I think, are near perfect parallels to 08 Panthers and Titans. All 3 had great regular seasons, peaked early; little playoff experience (Panthers had some, yes); no real identity, don't do anything amazing, some solid defense/run game with a game manager at QB, bout it. So they're sitting content on their bye week, then they come out to the game with their mundaneness and then BAM; a hot AZ team with a great offense torches them, or a hot BALT team with a great defense shuts em down.
Well, you look at GB and they're #5 in total D, #2 in scoring D, have the #5 passing attack (and maybe most lethal), AND could have a decent running game now going with Starks. And now they're a little hot coming into mundane ATL. Seems like a perfect fit to me for another road win and another loss for a 1st round bye.
And with Balt/Pitt, +3.5 is a total gift, imo. Last 4 games between the two have been decided by exactly 3, and both are huge rivals. Balt is also a team that's done it and been there before; 4-2 SU on the road in playoffs since 2008.
Thinking history repeats itself here at least once on Saturday (GB over ATL, maybe Balt over Pitt) and some 1st round byes go down.