You automatically used the word "or" as if that is the only possibilty. It doesn't have to be "or". It could be "and". It could be "neither". Let's use some data to help arrive at an accurate assessment. To help clarify, let's go with the mid of your ranges - 5 flaccid, 7.75 erect, 2.75 increase. From the data below it appears you are definitely a shower, but you also qualify as a grower to some extent.
Blackwell Synergy - Cookie Absent
On that chart notice that the 200 Turkish men had a combined averaged flaccid of 2.7" and upon erection 5.0". The largest flaccid on the chart is homosexual men at 4.1" and their overall erect size at 6.5".
Here, from the lines in which there is a flaccid to erect comparison I'll put it all in order from shortest flaccid to longest flaccid:
Flaccid-----------------------------------Erect
2.7"--------------------------------------5.0"
3.4"--------------------------------------5.7"
3.5"--------------------------------------5.1"
3.6"--------------------------------------5.6"
3.8"--------------------------------------6.1"
3.9"--------------------------------------6.1"
4.1"--------------------------------------6.5"
At another site, Thundersplace, overall the 3" flaccids averaged out to 5.75" erect (grew 2.75") and the 5" flaccids averaged out to 7.25" erect (grew 2.25"). Thundersplace's penis size chart closely matches doctor studies, so it stands to reason that it's flaccid to erect database can pretty much be trusted to be accurate enough to trust the flaccid to erect correlation .
And at another site that contains photos along with the measurements:
http://www.erectionphotos.com/softH...dGalleryP01.htm
Flaccid Length--------Averaged Erect Length----------------Amount of increase in inches
1.00-1.49---------------------4.71-------------------------------------+3.50
1.5-1.99----------------------4.89-------------------------------------+3.14
2.00-2.49---------------------4.88-------------------------------------+2.63
2.50-2.99---------------------4.92-------------------------------------+2.17
3.00-3.49---------------------6.07-------------------------------------+2.82
3.50-3.99---------------------6.08-------------------------------------+2.33
4.00-4.49---------------------6.69-------------------------------------+2.44
4.50-4.99---------------------7.00-------------------------------------+2.25
5.00-5.49---------------------7.35-------------------------------------+2.10
5.50-5.99---------------------7.80-------------------------------------+2.05
6.00-6.49---------------------na----------------------------------------na
6.50-6.99---------------------9.00-------------------------------------+2.25