Keeping track of the physical properties, so that results can be compared to other calculations or real-world data, is difficult for me.  So this section dealing with changes to the Reynolds number needed to be its own section.

 Paragraph 2.1.7.1 takes only one sentence to change the Reynolds number, 

"Since the Reynolds number is required to be increased by a factor of 10, decrease the kinematic viscosity by a factor of 10, i.e. to 1x10^-1 m^2/s."

Keeping track of the physical property, along with the appropriate units, is difficult for me.  It probably gets easier the more frequently one works with these cases.  In the meantime, I will probably add my own comment header to the physicalProperties file in the constant directory.  This is my version 1.0:

/*-------------------------- Properties Cheat Sheet-------------------------*\
Re = d|U| / ν
Re = Reynolds Number = 100
d = characteristic length = 0.1 m
|U|= characteristic velocity = 1 m/s
ν = nu (kinematic viscosity) = 0.0001 m^2/s

properties in order:
[
NA
Length
Time
NA
NA
NA
NA
]
\*---------------------------------------------------------------------------*/

With that in place, the last part of part of paragraph 2.1.7.1 talks about setting the controlDict startFrom value to latestTime.  Although not specified either way, I assumed the value for startTime was irrelevant when using latestTime.   I assumed it would look for the folder containing the latest time.  That was incorrect; I still needed to st the startTime value to 0.5.  

I was interested to see what a higher Reynolds number would look like with a finer grid.  So, I increased the Reynolds number to 100 (by decreasing nu to 0.001 in the constant file.  I then used the graded cube from that portion of the tutorial and increased the number of cells in each sub-block to 30.  The solver was unable to find a solution like that because I failed to change the timeStep after changing the cell size.  I added a memory jogger, similar to the physical properties one, to place in the controlDict file.  I also had the solver start at 0, rather than mess with re-mapping.  

/*---------------------------- Reminders ------------------------------------*\
Co = δt|U|/δx; Co < 1

so δt = Co δx/|U|

if the cell size is graded, the smallest cell size, δxs, is:

δxs = l*(r-1)/(αr-1)
r = R^(1/(n-1))
α = R for R>1 and α = 1 - r^-2 + r^-1 for R<1

l = the length along which the cells are graded
n = number of cells
r = ratio between one cell size and the next
R = Ration between the last and first cells

For this case:
l = 0.05m (0.1m cube divided into quarters)
R = 4
α = 4
n = 20
r = 1.0757

so δxs = 0.001146

and δt = 0.001s (rounded) since |U| = 1 m/s

\*---------------------------------------------------------------------------*/

The initial run entTime was 2.0 seconds, which wasn't long enough.  I changed that value to 10.0 seconds, but the solver converged just before 5 seconds.  As noted in the User Guide, the velocity converged before the pressures, somewhere around 2.5 seconds.